Djokovic wasn’t happy with the blue clay used for this year’s tournament and he looked less confident in some parts of the match.
After winning the first set comfortably, the Serbian unexpectedly dropped the next one, shaking his head on many occassions in the direction of the court.
But the world no.1 regained his focus in the decider and breaking Gimeno-Traver in the 6th game, he went on to win the set and match against the 137th ranked Spaniard.
Djokovic will play the winner of the match between Stanislas Wawrinka of Switzerland and Jurgen Melzer of Austria in round three.
In the remaining first round match, 14th seed Richard Gasquet of France had to work hard for his victory against Thomaz Bellucci, prevailing 4-6 6-4 7-6 (5) in the end.
Gasquet needed 7 match points to seal the match in 2 hours and 43 minutes, although Bellucci also had his chance in the third set. After breaking back to level the set, he forced a tiebreak and got the first mini break to go 3-2 up. But he couldn’t capitalise and it is Gasquet who will play Serbian Viktor Troicki in round two.
Troicki overcame American Donald Young 6-1 4-6 6-1 in yesterday’s first round match.