The Australian Open has seen its biggest shock so far as 19-year-old American qualifier Learner Tien stunned three-time finalist Daniil Medvedev in a five-set epic to reach the third round on his grand slam debut outside of the United States.
Tien completely outplayed Medvedev over the first couple of hours to take a commanding lead but the fifth seed saved match point in the third-set tiebreak as the contest went the distance, late into the night in Melbourne.
