Gilles Müller, Luxembourgian tennis player

Gilles Müller (Luxembourgish pronunciation: [ˈʒil ˈmylɐ]; born 9 May 1983) is a retired tennis player from Luxembourg. He is a two-time Grand Slam quarterfinalist and the most successful male tennis player in the history of his country. Müller won two titles on the ATP World 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 excellent net skills. Following his retirement, Müller was appointed as Luxembourg's Davis Cup team captain.