American teen Learner Tien knocks out Daniil Medvedev in big upset

Medvedev cut a frustrated a harrowed and frustrated figure at the end of the marathon as he lost to his teenaged oponent 3-6, 6-7(4), 7-6(8), 6-1, 6-7(7). He chucked his equipment toward the sideline, skidding it across the court until it reached an advertising panel near his bench. At other moments of anger, Medvedev hit a ball against the back wall, toppled a camera behind a baseline and punched his racket bag.

Tien was born on December 2005 in Irvine, California to Vietnamese parents. His and sister Justice's names are a way for their parents to honour their professions - Learner's mother Huyen Tien is a teacher and his father Khuong Dan Tien is real estate lawyer. “An attorney seeks justice. A teacher seeks a learner. They were virtuous names,” Khuong is quoted as saying in an LA Times article.

Tien's tennis journey started almost as soon as he learnt to walk. His parents would often play the sport recreationally and so Tien laid his hands on a racket when he was just over a year old. He soon showed great promise, playing a tournament for the first time at the age of five and, according to the LA Times, won his first championship at the age of six. His father said that the trophy had a jack-o’-lantern on it because it was Halloween.