In all-American clash, Young surges into first semifinal since 2015.
World No. 5 Simona Halep is the latest to announce her Rio withdrawal.
Two seeds fail to survive Hamburg quarterfinals, Renzo Olivo survived near facial trauma.
Milos Raonic becomes the latest top tennis player to withdraw from the Olympic Games in Rio.
This is how you win set point in sliding style.
Del Potro in doubles duty for Argentina vs. host Italy this weekend.
Who is the next Novak Djokovic? It could be you.
