Defending Australian Open champion Jannik Sinner stumbled early Thursday ... I can improve, yes, but I'll take it." Danielle ...

American Danielle Collins is out of the Australian Open following a straight-sets defeat by fellow countrywoman Madison Keys.

Defending champion Jannik Sinner raced to victory at the Australian Open to sweep into the last 16 as Iga Swiatek demolished ...

Jannik Sinner has announced that he will part ways with his coach Darren Cahill at the end of the season. The Australian, who ...