About Gilles Müller
Gilles Müller is a Luxembourgish former professional tennis player. He is a two-time major singles quarterfinalist, making him by far the most successful male tennis player in Luxembourgish history. Müller won two titles on the ATP Tour and achieved a career-high ATP singles ranking of world No. 21 on 31 July 2017. He was known for his powerful left-handed serve and net skills. Following his retirement, Müller was appointed as Luxembourg's Davis Cup team captain. Müller played his first junior match in 1997 at the age of 14 at a grade 4 tournament in Luxembourg. 2001 was Müller's most successful year in juniors. He won the Boys' Singles final at the 2001 US Open, defeating Taiwan's Yeu-Tzuoo Wang (7–6, 6–2).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.