player representing the United States and became the top-ranked junior in the world after winning the junior boys' Australian Open title in 2018. Grand Slam finals Singles: 2 (1 title, 1 runner-up) Doubles: 2 (1 title, 1 runner-up) Other significant finals Grand Slam Cup Singles: 1 (1–0) Masters Series finals Singles: 3 (1–2) Doubles: 4 (3–1)=== ATP career finals Singles: 27 (10 titles, 17 runners-up) Doubles: 24 (10 titles, 14 runners-up) Performance timelines Singles 1 Held as Stockholm Masters until 1994, Stuttgart Masters from 1995 to 2001. Doubles 1 Held as Stockholm Masters until 1994, Stuttgart Masters from 1995 to 2001. Top 10 wins References External links Sunday Times article 30 August, 2009 1968 births Living people Australian Open (tennis) champions Czech expatriates in Monaco Czech male tennis players Czech sportspeople in doping cases Czechoslovak male tennis players Doping cases in tennis French Open junior champions Hopman Cup competitors People from Monte Carlo Tennis players from Prague Wimbledon junior champions Grand Slam (tennis) champions in men's singles Grand Slam (tennis) champions in men's doubles Grand Slam (tennis) champions in boys' doubles Masters tennis players Czech emigrants to the United States