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.

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 says his Australian Open first-round exit was "karma" after withdrawing from the men's doubles with his brother to focus on singles.

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.

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,

Top seed Jannik Sinner cruised in his Australian Open opener, Novak Djokovic and Carlos Alcaraz took one step closer to a quarterfinal showdown, and No. 11 seed Stefanos Tsitsipas was bounced by an unseeded American on Monday in Melbourne.

Alex Michelsen dumps former finalist Stefanos Tsitsipas out in first round - Tsitsipas suffered a third consecutive grand slam defeat.