In pics: Day 7 highlights of Australian Open

American Frances Tiafoe celebrated his 21st birthday by stunning Bulgaria's Grigor Dimitrov 7-5 7-6(6) 6-7(1) 7-5 in the fourth round of the Australian Open on Sunday.

Birthday boy Frances Tiafoe topples Dimitrov to reach Australian Open quarters

Australian Open fifth seed Kevin Anderson lost his second round match to Frances Tiafoe 4-6, 6-4, 6-4, 7-5 in a major upset on the third day of the Grand Slam on Wednesday.

Kevin Anderson knocked out of Australian Open in four sets

Prajnesh Gunneswaran, who made his Grand Slam debut, went down 6-7(7), 3-6, 3-6 to American Frances Tiafoe in the first round of the Australian Open on Monday, ending India’s challenge in singles draw.

Australian Open: Prajnesh loses to America's Tiafoe on Grand Slam debut, ends India’s singles challenge

In pics: Day 1 highlights of Australian Open

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In pics: Day 7 highlights of Australian Open

Birthday boy Frances Tiafoe topples Dimitrov to reach Australian Open quarters

Kevin Anderson knocked out of Australian Open in four sets

Australian Open: Prajnesh loses to America's Tiafoe on Grand Slam debut, ends India’s singles challenge

In pics: Day 1 highlights of Australian Open