Greek tennis sensation Stefanos Tsitsipas lost to unseeded American Alex Michelsen in the opening round of the Australian Open on Monday, causing a shocking early exit. In what is already being hailed as one of the biggest upsets of the tournament, the world No. 12 lost in four sets, 7-5, 6-3, 2-6, 6-4.

In the opening sets, Tsitsipas, a three-time Melbourne Park semifinalist, found it difficult to settle into a rhythm as Michelsen took advantage of crucial opportunities.

The American’s unrelenting play ultimately defeated the Greek, who had made a valiant comeback in the third set but was unable to maintain his momentum in the fourth.

Tsitsipas, who was a serious contender going into the tournament, has suffered a serious setback. Outside of the top 100, Michelsen showed remarkable competence under extreme pressure, breaking Tsitsipas late in the last set to end the match.

Fans were surprised by Tsitsipas’s loss in the Australian Open 1st round to Michelsen. One fan wrote on X: “Stef is so cooked. His backhand is weak; he struggles anywhere else but on clay. His career outlook is bleak.”

Stefanos Tsitsipas in 2025

Ranked no.12, Tsitsipas played his last match on the 13^th of January when he was defeated by world no.42 Alex Michelsen 7-5 6-3 2-6 6-4 in the 1^st round of the Australian Open (draw).

Until now, during this year Stefanos owns a compiled 1-2 record.

Stefanos Tsitsipas will come up against John Isner in the Round Robin on Sunday at 6:00 pm on CENTER COURT. Their record is 6-2

for Tsitsipas.

Tsitsipas won 12 titles in his career: 1 on hard courts, 5 on clay courts, 5 on indoor courts and 1 on grass courts. (See the list of his titles)

Michelsen at the Australian Open, ranking, and results in 2025

Currently the world no.42, Alex owns a compiled 4-2 win-loss record in 2025. Alex is now having a run at the Australian Open where he toppled the world no.12 Stefanos Tsitsipas 7-5 6-3 2-6 6-4.

Alex Michelsen will face the world no.258 James McCabe in the 2^nd round. Their current head to head is 1-0 for Michelsen.

He is also scheduled to play in Dallas (Dallas Open) on the 3rd of February and () on the 29th of December.

Stefanos Tsitsipas and Alex Michelsen squared off just twice. Their head to head is 2-0 for Michelsen. Before, the last time they played each other, Alex Michelsen won 7-5 6-3 2-6 6-4 in the 1^st round in Melbourne (Australian Open) on the 13^th of January 2025.

Here the video highlights.