At 19 years of age, Learner Tien becomes the youngest man to reach the Australian Open fourth round since Rafael Nadal.
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Learner Tien and Alex Michelsen were born about 15 months apart and first crossed paths a decade ago when they were playing in Southern California tennis tournaments ...
Ruthless defending champion Jannik Sinner was in the zone Saturday as he powered into the last 16 of the Australian Open with ...
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