Novak Djokovic was upset by Matteo Berrettini 7-6 (4), 6-2 on Tuesday at the Qatar Open in the Serb’s first match since exiting the Australian Open with a hamstring injury.

Djokovic, 37, ranked No. 7, lost to the Italian for the first time in five career meetings. The Serbian reached the Australian Open semis but retired against Alexander Zverev due to a hamstring injury.