Iva Jovic of the U.S. plays a backhand return to Elena Rybakina of Kazakhstan during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2025.

MELBOURNE (Reuters) - Highlights of the fifth day of the Australian Open on Thursday (all times GMT): American qualifier Learner Tien held his nerve in a battle that lasted four hours and 49 minutes to stun Russian fifth seed Daniil Medvedev, beating him 6-3 7-6 (4) 6-7 (8) 1-6 7-6 (7) and reaching the third of a Grand Slam for the first time.

Australian Open is showcasing a crop of young men's players who are better equipped for the changes in tennis than their elders.