Trip to Haiti makes Naomi Osaka appreciate her good life as she reaches Australian Open quarterfinals

A quick look at the Australian Open: Serena Williams faces Simona Halep in the 4th round

Danielle Collins calls herself 'feisty' and she certainly was during her surprisingly easy 6-0, 6-2 victory over 3-time major champion Angelique Kerber at Australian Open

Frances Tiafoe has been inspired by LeBron James, gotten hydration help from pickle juice and considers his wild ride to the Australian Open quarterfinals 'crazy'

The Latest: Sloane Stephens' best Australian Open in 5 years ends with 6-7 (3), 6-3, 6-3 loss to unseeded Anastasia Pavlyuchenkova in 4th round

Roger Federer's bid for a third consecutive Australian Open title ended in a surprising 6-7 (11), 7-6 (3), 7-5, 7-6 (5) loss to 20-year-old Stefanos Tsitsipas, the first player from Greece to reach a Grand Slam quarterfinal

Two-time defending champion Roger Federer loses to Stefanos Tsitsipas in Australian Open's 4th round

Ash Barty is little more than two years back from a short experiment with cricket and has caught the attention of a nation by becoming the first Australian woman in a decade to reach the quarterfinals of the Australian Open

Serena Williams has dropped a total of 9 games through 3 matches at the Australian Open so far and now will take on No. 1 Simona Halep

Even Roger Federer needs a photo ID to get where he's going at the Australian Open