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.

Stefanos Tsitsipas twice smashed his racket onto his bag as he exited the Australian Open in the first round against young American Alex Michelsen. Tsitsipas, who is enduring a miserable run of Grand Slam form,

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.

American tennis player Alex Michelsen defeated Greek tennis star Stefanos Tsitsipas in the first round of the 2025 Australian Open.

Stefanos Tsitsipas (No. 11) faced a surprising first-round exit against Alex Michelsen (No. 41). The American had previously defeated Tsitsipas in their only prior meeting at the Tokyo Open.

Alex Michelsen beat Stefanos Tsitsipas in a four-set thriller to book his place in the second round of the competition

Young American Alex Michelsen caused the first big upset of the Australian Open by knocking out former finalist Stefanos Tsitsipas in the opening round. Tsitsipas was beaten by Novak Djokovic in the final two years ago and is also a three-time semi-finalist, but he has struggled since reaching the quarter-finals of the French Open last spring.

No. 11-ranked Stefanos Tsitsipas will meet No. 41 Alex Michelsen in the Australian Open Round of 128 on Saturday, January 11.His last time out, Tsitsipas fell to Michelsen 6-4, 1-6, 2-6 in the