Meet the 50-win club of the 2019 ATP season

#4 Stefanos Tsitsipas (54-25)

Stefanos Tsitsipas

Stefanos Tsitsipas dethroned two-time defending champion Roger Federer in the fourth round of the Australian Open and went on to become the youngest Grand Slam semifinalist in over a decade (since Novak Djokovic) before losing to Rafael Nadal.

The young Greek won his second career title in Marseille before losing to Federer in the Dubai final. Tsitsipas then won his first clay-court title in Estoril and beat Rafael Nadal in the Madrid semifinals to reach a second Masters 1000 final, where he lost to Djokovic.

Following a five-set defeat in an epic five-hour Round of 16 clash with Stan Wawrinka at Roland Garros, Tsitsipas endured first-round exits at Wimbledon, Montreal, Cincinnati and the US Open.

The young Greek stemmed the rot with a run to the Beijing final, where he lost to Dominic Thiem. He then beat defending champion and then World No. 1 Djokovic in the Shanghai quarterfinals to qualify for the season-ending ATP Finals.

Tsitsipas lost to eventual winner Federer in the Halle semifinals before beating Alex De Minaur in the Paris second-round to register his 50th win of the season, and the 100th of his career.

The young Greek marked his debut at the ATP Finals with a semifinal win over 6-time champion Federer before following up with a deciding set tiebreak win over Thiem in the final to become the first player since Grigor Dimitrov (2017) to win the season-ending tournament on his debut.