Daniil Medvedev praised his Australian Open first round opponent Kasidit Samrej after being stretched to five sets by the 418th-ranked Thai wildcard before winning 6-2 4-6 3-6 6-1 6-2 on Tuesday.

American teen Learner Tien pulled off the biggest upset so far at the 2025 Australian Open, ousting Russian Daniil Medvedev -- the No. 5 player in the world -- in a 4-hour, 49-minute thriller at Margaret Court Arena.

Learner Tien pulled off a massive upset against Daniil Medvedev at the Australian Open. So, who is Tien, the 19-year-old out of California?

American teenager Learner Tien produced arguably the biggest shock of the Australian Open so far as he defeated last year’s runner-up Daniil Medvedev in five sets, 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (7).

The 19-year-old from Irvine, California nearly lost a two-set lead from match point up but held off a late surge from a former world No. 1 to win the biggest match of his career.

Daniil Medvedev’s “Dead Fish” celebration at the end of the 2021 U.S. Open final stands out as among the most unusual and unexpected reactions to a major tennis championship

The 19-year-old who was a late qualifier to the Grand Slam secured the biggest win of his young career on Thursday

The outcome was eyebrow-raising because of the wide gulf in experience and accomplishments between the two players at Margaret Court Arena.

After squandering a match point during the third set, Learner Tien was blitzed 6-1 in the fourth set by Daniil Medvedev. It looked as if the 19-year-old American - coming off a five-set win in round one - was cooked and seemingly being run over by a three-time Australian Open finalist.

Daniil Medvedev is facing more fines from the Australian Open after failing to attend his post-match press conference after the defeat to American teenager Learner Tien. The fifth seed was upset 6-3 7-6(4) 6-7(8) 1-6 7-6(7) in a four hour,

The Irvine native and 19-year-old qualifier, who played one semester at USC, wins a 4-hour, 49-minute thriller that ends at nearly 3 a.m. in Melbourne