However, Djokovic managed to recover and secure his place in the semi-finals of the ATP Masters 1000.
His next opponent will be seventh seed Taylor Fritz, who defeated David Goffin 6-3, 6-4 in his quarter-final match.
World No. 1 Djokovic had to fight hard to overcome world No. 65 Jakub Mensik.
The young Czech had achieved surprising victories on his way to the quarter-finals, including eliminating two of the tournament’s top players. Mensik started strong, winning the first set against Djokovic, which hinted at a possible upset. However, Djokovic raised his level in the second set and dominated the decider, winning with a final score of 6-7(4) 6-2 6-4.