Top-ranked Daniil Medvedev committed 11 double-faults in falling to Stefanos Tsitsipas 7-6 (8/6), 3-6, 6-3 in Sunday's semi-finals of the ATP and WTA Cincinnati Masters.

Four-time Grand Slam champion Naomi Osaka retired from her opening match on Tuesday at the WTA Toronto Masters with lower back pain, raising injury concerns with the US Open looming.

Former world number one Maria Sharapova says she is not looking too far ahead after returning from a doping suspension but concedes she is eager to be competing for the biggest titles in tennis again.

Eugenie Bouchard claimed plenty of other players on the WTA Tour share her outspoken views on Maria Sharapova's return from an 15-month doping ban, but are too "scared" to speak out.