Michael Chang: Piecing together the puzzle of Learner Tien's potential

ATP Tour

Michael Chang: Piecing together the puzzle of Tien's potential

Former World No. 2 discusses his relationship with rising lefty Tien

ATP Tour

Michael Chang has coached rising lefty Learner Tien since July 2025. By ATP Staff

Michael Chang understands what it means to break through early.

The American, who became the youngest male major winner at 17 years old in 1989 at Roland Garros, now sees echoes of that same early promise in one of the sport’s rising stars: Learner Tien. Since the pair began working together in July last year, Tien has captured his maiden ATP Tour title in Metz and lifted the trophy at the Next Gen ATP Finals, underlining his status as one of the game’s most exciting young players.

“I think he’s a very special individual,” Chang told ATPTour.com in Indian Wells, referring to 20-year-old Tien. “He thinks a lot more than most players out on the court. He’s very much a fighter that people don’t see until they get into the thick of it with him. He’s not the type of player that will hit a great shot and shout ‘Come on!’ He’s not that type of personality, but he fights and he doesn’t give up, which is something I appreciate.”

The two first crossed paths early last season during a brief encounter in Hong Kong. At the time, Chang knew little about the young left-hander practising on a nearby court. That changed quickly a few weeks later when Tien burst into the spotlight at the Australian Open, stunning Daniil Medvedev in a marathon five-setter en route to the fourth round.

For Chang, coaching has always been rooted in curiosity and problem-solving. The same analytical mindset that defined his playing career now shapes the way he works with players, whether they are rising stars on the ATP Tour or members of his own family picking up a racquet.

“I’m very much a thinker on the tennis court. I enjoy trying to figure out ways to win matches, and figure out ways to improve,” said Chang, who reached a career-high No. 2 in the PIF ATP Rankings. “From a coaching standpoint, the combination of those things is a lot of fun. Whether I’m out there working with Learner or my kids… It’s fun to be able to help people improve and see a smile on their face. For me, it’s very satisfying.”

Chang’s reputation as one of the game’s most respected coaches was established well before his partnership with Tien. In the offseason of 2013, he began working with Kei Nishikori, helping the Japanese star unlock the next phase of his career. Within a year, Nishikori broke into the Top 10 and produced one of the most memorable runs of his career to reach the 2014 US Open final.

“Kei was already a great player, but he had a tough time breaking into the Top 10,” Chang said. “It was fun to work with him and see him accomplish that in 2014. I watched some great matches with Kei… His run at the US Open in 2014 was very special.

“It was also a lot of fun to see him win in Tokyo for the first time in front of his home crowd. There’s a lot of great memories, but most importantly, seeing him improve as a player and mature as a person.”

The sport has changed in the years since Chang first began working with Nishikori. One of the biggest differences today is the introduction of coaching during matches. It is a shift that has altered the dynamic between coach and player, something Chang has had to adjust to as he now works with Tien.

“Coaching back then is very different from coaching now,” Chang explained. “We can coach now during the matches, so that changes the dynamic immensely. There were a few opportunities to do that with Kei, but they were few and far between. My approach toward working with Kei was to understand his game and how he was as a person. It was trying to find ways of communicating in the best way to work on a lot of those weaknesses, and to make his strengths even stronger.

“For me, it’s always been a fun project. It’s constantly dissecting, constantly analysing, looking at why he’s winning and losing particular matches. A lot of it’s just solving puzzles and putting in the hard work to find answers.”

Learner Tien listens to coach Michael Chang at the 2026 Australian Open. Photo: Paul Crock/Getty Images

The transition from player to coach, Chang says, happened far more casually than people might expect. In fact, some of his earliest coaching experience came much closer to home.

“I was actually coaching my wife out on Tour, so I kind of messed up her tennis career,” Chang joked. “I don’t have regrets and hopefully she doesn’t. I wasn’t teaching anything locally. I didn’t have an academy or any juniors I worked with. I had another player that I would hit with from time to time when he was in college that I would help a bit, but I didn’t have anything organised.”

As opportunities arose, he found himself drawn back to the game in a different role, helping the next generation navigate the challenges of life on Tour.

“I wasn’t playing on the Tour anymore, but tennis was always going to be a huge part of my life,” Chang said when asked about his route into coaching. “It wasn’t something that I really sought, but opportunities just opened themselves up and I was able to work with some really great players. Kei being one of them and now Learner.”

While their careers began decades apart, Chang and Tien share certain similarities in their early on-court rises as well as in their outlooks that have helped their partnership grow quickly.

“We share a similar faith, so that brings a unique dynamic to our coaching relationship,” Chang added. “Knowing that he’s going out there and playing his best for the Lord… Every time he goes to a tournament, he’s excited to play. I haven't run into a week that he has liked to take off, he’s always hungry.

“It’s special when you have that kind of passion, because I don’t know if everybody has that. For him to have that eagerness to compete against the best players in the world is only going to set him up for more success.”

Tien’s rise has already included some notable milestones. During his breakthrough 2025 season, he earned five Lexus ATP Head2Head victories against Top 10 opponents and cracked the world’s Top 30 for the first time. With Chang now part of his corner, the hope is that those early achievements are just the beginning.

“He’s a great kid. He’s got a good head on his shoulders,” Chang said of Tien. “He’s extremely talented and very smart. It’s been a lot of fun to work with him and see him improve. It’s been great to see him have some great success and hopefully we can continue to work on that.”

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