British men's number one Cameron Norrie is out of the Australian Open after losing to rising star Jiri Lehecka.
Norrie, seeded 11th, had been aiming to knock off another notable career milestone by reaching the last 16 at Melbourne Park for the first time.
He led by two sets to one before Czech Lehecka, 21, fought back to win 6-7 (8-10) 6-3 3-6 6-1 6-4 in the third round.
The 27-year-old left-hander was far from his best and needed treatment on his left knee early in the decider.
Lehecka will play Canadian sixth seed Felix Auger-Aliassime in the fourth round on Sunday.