Alwi Farhan Trains With Kento Momota Before Asian Games 2026: The Lesson Lives in the Knees, Not the Smash

In the video released by PBSI, the moment worth noting comes at the seventeenth second.

Alwi Farhan jumps for a smash, lands on his left foot, and his knee bends to an angle I estimate at about twenty-five degrees. A normal teenage player bounces straight back. Alwi stands still. About half a second. His eyes flick to the left court, and only then does his hip rotate back toward the centre. That half second is what I write into my tracking book, not the smash, not the hand speed.

Across the net stands Kento Momota.

I have sat courtside for nearly twenty years at various events, and I have learned one thing: spectators watch badminton with their eyes, players play badminton with their knees. The smash gets people out of their seats. The knee decides who is still standing in the quarter-finals. For Alwi, Indonesia's men's singles player entering the final preparation block before the Asian Games Aichi-Nagoya 2026, that half second of pause after landing is a very long story.

Tokyo, August, and a tournament that awards no ranking points

The Asian Games Aichi-Nagoya 2026 open on 19 September 2026 and close on 4 October 2026. Badminton sits among the core sports of the Games. This is a continental multi-sport event, held once every four years. One detail outsiders rarely notice: multi-sport Games such as the Asian Games generally do not carry BWF World Ranking points under the World Tour system. For a coaching staff, what sits on the scales here is a medal and national honour, not a position on the world ranking list.

That shapes the entire preparation approach. There are no points to defend, no points to protect. There is a medal, or there is nothing.

PBSI sent Alwi Farhan to Japan for a camp described as the final stage. Within that framework, he had a sparring session with Kento Momota. The bulletin issued by the Indonesian federation calls it a lesson. Alwi's own quote, according to the PBSI source, speaks only of happiness and honour at sharing a court with a player he once watched on television.

The distance between those two statements is worth noting. On one side is the headline "taught by Momota". On the other is a purely emotional quote. I will not rush to judge who is right. I only record that technical evidence for the word "lesson" appears in none of the sources I have read. No smash speed, no rally length, no unforced error rate, no metric from that session has been published.

About Momota, I do not need a long introduction. The former Japanese world number one, architect of the defensive-counterattacking style, a man who turned seemingly dead rallies into points. His career has a severed chapter: a suspension in 2026 over illegal gambling that cost him the Rio Olympics. He came back, climbed to the top of the world, then was in a car accident in Malaysia in January 2026. Facial injuries, eye damage, and a long stretch of days in which he could not rediscover the feel of the shuttle. He retired in 2026.

When a man like that stands across the net in a training session, what gets passed on is not technique. It is rhythm.

Two bodies, one long-rally rhythm

I have followed Alwi's matches since his junior days, including his boys' singles title at the 2026 World Junior Championships in the United States. What caught my attention was how he distributes his footwork rhythm in the opening game. Young attacking players tend to front-load their effort across the first two-thirds of a match, winning points with speed, then fading at the end. Alwi tends the other way: he accepts long rallies, keeps the shuttle alive, and waits for his opponent to lose patience. A teenage player choosing patience as a weapon is rare.

That is why the session with Momota is not a speed contest. It is an endurance test.

Picture the kinetics of a long rally at men's singles level. Every time an opponent returns to a deep corner, the player must take a cross-court step, drop his centre of gravity, and push back up. A rally lasting twenty shots means nearly twenty times the knee absorbs body weight within less than forty seconds. That force does not disappear. It goes into the patellar tendon, into the anterior cruciate ligament, into the Achilles tendon.

Every injury is a silent confession of the body. What the body confesses, almost always, is not about that day. It is about the weeks before it.

I once built an injury tracking table for a club in Hanoi during the return-to-training phase after the 2026 stoppage. Three weeks of compressed training, seven of twenty-five players down with hamstring injuries. None of them fell. None of them collided. Their bodies had simply not been given back their base fitness before being asked to sprint at full speed. I sent the report to the team doctor and the coaching staff first, and only then wrote an anonymised analysis recommending a minimum of six weeks of base conditioning. The national league later pushed its schedule back by a month.

I tell that story not to compare two sports biomechanically. I tell it because the principle is identical: training load rises faster than the adaptation speed of tendons and ligaments. Physiology does not care whether you are a footballer or a badminton player.

For Alwi, the Tokyo camp falls in a period when the competition calendar has been compressed to make room for the Games. This is a deliberate loading phase, immediately before an event he is entering for the first time. That is the point I would want the Indonesian coaching staff to hold in mind, and I believe they already do, because they chose Japan rather than somewhere else.

Playing against a defensive-counterattacking specialist like Momota produces a very particular type of load. You do not have to run fastest. You have to run longest. Average rally length rises, total movement distance rises, but peak speed falls. As base conditioning, this is a good exercise. As load management, it is a hard exercise to measure, because it does not produce easily identifiable explosive bursts. It produces a silent accumulated volume.

I call that a deferred debt. Injury is memory with the payment postponed. A training body does not record a single jump. It records the total number of jumps across three weeks.

Looking at recent history in world men's singles, the pattern repeats steadily. Young players pushed into a dense competitive schedule at eighteen or nineteen tend to have the second phase of their careers eroded noticeably earlier than the previous generation. I once tracked a Spanish midfielder who played sixty-four matches in a single season at eighteen, and wrote that the price would arrive later, not immediately. Four months later he suffered a hamstring injury and missed six weeks. There is nothing mystical here. It is arithmetic.

For Alwi, the luck lies in the fact that badminton has rest mechanisms between events that football does not. There are no two-week qualifying rounds. There are gaps in which to reload. But a gap only helps if it is used properly.

One fact deserves mention, though I can only attach it with a caveat. Some accompanying headlines refer to Alwi winning the 2026 Australia Open, a Super 500 level event. That information comes from a secondary headline, not from the body of the PBSI release, and I have no second source to verify it. If accurate, it is a sign of rising form, and also a reason why external expectations rise faster than the underlying base. I always keep those two things apart.

At team level, Indonesia's men's singles picture is also worth watching. Anthony Sinisuka Ginting and Jonatan Christie have carried this lane for nearly a decade. Both pass the thirty-year threshold within the current cycle. Alwi belongs to the group being bet on for the next rotation, and sending him to Japan in the final block is an institutional vote of confidence, not a participation slot to make up the numbers.

The lesson sits where no camera is rolling

Media in Indonesia and Japan both like this story. A retired legend beside a young talent on the eve of a continental Games is an image that travels. I understand why it gets shared. But there are three points I want to state plainly.

First: the value of the session with Momota lies almost entirely outside technique. Momota did not teach Alwi how to smash. What a top defensive player passes to a young player is a feel for rhythm, for when to add one more shot instead of finishing early. That cannot be written into a lesson plan. It only enters through the skin.

Second: the risk of this type of session is underrated. Playing against a patient opponent forces you to become patient too. For a young player still shaping an attacking identity, absorbing too many defensive rally patterns can leave a residue in how he makes decisions in real matches. I have seen this across sports: an athlete who learns too well from a strong opponent loses the very weapon that made people pick him in the first place.

Third: the story is being pushed ahead of the results. Alwi is only at the start of his senior continental career. The leading men's singles players in Asia today have accumulated years at the top. Building him into a succession symbol before he has an Asian Games quarter-final is an expectation risk, not a technical one. But in a sport where psychology dominates, expectation risk hurts as much as tendon risk.

I once spoke with a team doctor about a young foreign signing with a herniated disc whose scan results were being withheld to negotiate a transfer. I cross-checked the imaging, verified the extent of the damage with the treating doctor, then persuaded the board to disclose it honestly. The deal collapsed. The player had surgery and returned a year later. The collapse was not in the contract. It was in the knee nobody wanted to mention.

I keep that principle when I write about badminton: three sources, comprising the doctor, the coach and the athlete himself. In this story, I have the federation source and the athlete's quote. I do not have the medical source or detailed movement data. I will not fill that gap with speculation. I will pose the questions so that people with authority can answer them.

One thing about my professional limits should be stated clearly. I do not diagnose. I watch movement, cross-check public data, and record what the eye sees. If Alwi has an issue with his knee or ankle, the spokesperson must be the Indonesian team doctor, not a reporter sitting half a world away from the court.

What I take away from that Tokyo afternoon

I do not know how far Alwi Farhan will go at Aichi-Nagoya. Nobody does, and anyone who says otherwise is selling you something that does not exist. But when I stop at that half second of knee give, I see a signal worth tracking for years: a young player who already knows how to let his body rest before his knee teaches him a more expensive lesson. I go to the court not to see who smashes hardest, but to see who does not dare jump on the rally that everyone else still jumps on. That capacity for restraint is often what separates a ten-year career from a five-year one.

If you want to track Alwi over the next two months, do not only watch the scoreboard. Watch how he walks into the third game of his first match. Watch whether he still rotates his hip back to the centre after every smash. Watch whether someone on the coaching bench stands up from their chair each time he lands on one leg. The body tells the story before the scoreboard gets a chance.