Alex Michelsen, a 20-year-old unseeded American, produced the biggest win of his young career with a 7-5, 6-3, 2-6, 6-4 first-round upset of 2023 Australian Open runner-up Stefanos Tsitsipas on Monday.

Alex Michelsen produced the biggest win so far of his fledgling career to upset 2023 runner-up Stefanos Tsitsipas in the first round of the Australian Open and the first person he credited was his mom.

American Alex Michelsen claimed the biggest win of his career when he stunned Stefanos Tsitsipas 7-5 6-3 2-6 6-4 in the first round of the Australian Open on Monday as the Greek 11th seed became the first major casualty at Melbourne Park.

MELBOURNE, Australia (AP) — Coco Gauff had a little difficulty adjusting to the sun at one end of Rod Laver Arena and dropped an early service game but quickly settled into a rhythm to start her Australian Open a 6-3, 6-3 win Monday over 2020 champion Sofia Kenin.

As a storm swept across Melbourne Park, Olympic champion Zheng Qinwen made the most of indoor conditions under a roof at Rod Laver Arena to advance to the second round of the Australian Open with a straight-sets win over 20-year-old qualifier Anca Todoni.

Olympic champion Zheng Qinwen overcame a sluggish start to blast into the Australian Open second round Sunday as storms caused havoc ahead of Aryna Sabalenka beginning her quest for a

Australian Open kicks off Saturday in Melbourne with a full schedule of men’s and women’s singles first-round action.

The best players in the sport of tennis are in Melbourne to compete in the 2025 Australian Open, with the first round of the men's and women's tournaments start

The Big Three is down to just Novak Djokovic , who stands alone from a golden generation of men’s tennis now that Rafael Nadal has joined Roger Federer in retirement . The Australian Open , which started Sunday (Saturday night EST),

Novak Djokovic is heading into the Australian Open with new optimism as he targets his 25th Grand Slam title in Melbourne, but he will face a slide down the ATP Rankings if his recent trend in form continues.

Here is everything you need to know about Novak Djokovic's appearance at the Australian Open, including the latest results from the tournament.