Learner Tien celebrated his shock Australian Open victory over three-times runner-up Daniil Medvedev in true teenage fashion, seeking out a well-earned pizza after edging a five-set thriller to progress to the third round.

At the age of 19, Learner Tien defeated Daniil Medvedev in a five-set thriller that finished just before 3 a.m. in Melbourne.

Daniil Medvedev could be set to leave the Australian Open with over $200,000 in fines and bills after defying the rules again on Friday morning after his shock loss to Learner Tien. The American qualifier pulled off an extraordinary 6-3 7-6 (7-4) 6-7 (8-10) 1-6 7-6 (10-7) win over Medvedev in 4 hours and 49 minutes on Margaret Court Arena.