World No. 1 on what it will take for her to play mixed doubles at Tokyo Olympics.
Roger Federer reflected on two US Open title prospects that slipped away.
Sofia Kenin will get another crack at Madison Keys in the US Open third round.
The American started slow but finished strong to reach the US Open's third round.
Elina Svitolina eyes battle of Odessa in New York.
Simona Halep sets her sights on the season-ending top spot.
Nick Kyrgios' corruption comments could result in suspension.
