Novak Djokovic's wait for his 100th ATP singles title continues after the two-time champion exited the Monte Carlo Masters in a straight-set opening loss to Alejandro Tabilo.
Djokovic, 37, made 29 unforced errors compared to his 18 winners in a subdued start to his clay-court season, which ended in a 6-3 6-4 defeat.
The record 24-time men's major champion had won the last 10 matches he had contested on clay - including his run to Olympic gold in July.
But Chilean Tabilo, the last player to beat Djokovic on the surface at the Italian Open 11 months ago, replicated that surprise victory to reach the third round.