American qualifier Learner Tien shocked the tennis world on Thursday when he upset last year's Australian Open runner-up Daniil Medvedev in a nearly five-hour, five-set match in the second round.
Learner Tien beats Daniil Medvedev and is the youngest US man in Australia's 3rd round since Sampras
Learner Tien has become the youngest American man to reach the Australian Open’s third round since Pete Sampras in 1990.
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