Jannik Sinner sent an Australian Open statement in rolling into the quarter-finals on Monday but fellow champion Madison Keys was dethroned as Melbourne braced for forecast 45C heat.

A clinical Jessica Pegula dumped defending champion and good friend Madison Keys out of the Australian Open on Monday to surge into the quarter-finals.

An erratic Madison Keys did enough on Thursday to reach the third round in her defence of the Australian Open.

Ukraine's Oleksandra Oliynykova lost to reigning champion Madison Keys on Tuesday at the Australian Open but said making her soldier father proud was more important than the result.

Jannik Sinner launches his bid to win a third Australian Open in a row on Tuesday as Madison Keys also kickstarts her title defence in Melbourne.

Madison Keys lost in the Adelaide International quarterfinals to rising Canadian talent Victoria Mboko on Thursday, less than a week away from the start of her Australian Open title defense.

Australian Open champion Madison Keys became the latest star to crash out of Wimbledon as the American sixth seed was stunned by Laura Siegemund.

The 37-year-old Tatjana Maria reached the Wimbledon semi-finals in 2022, but was forced to qualify for Queen's after dropping to 86th in the WTA rankings.

Novak Djokovic and Jannik Sinner flexed their muscles on Saturday, powering into the fourth round of the French Open in straight sets

Aryna Sabalenka overwhelmed Madison Keys 6-0, 6-1 to reach the Indian Wells WTA 1000 final.