"This time, I can lose tomorrow (his singles opener against Slovakia's Lukas Lacko) but for sure I'll try to stay focused on the match."
The week after winning a tournament like Roland Garros is never easy because there is a lot of tension, a lot of emotion," said the Spaniard.
"I also played a lot of matches on clay this season, I am always a little tired after the French. There are adjustments - the speed of the court, how to hit the ball on grass.
"I came here in 2005, played a couple years at Queen's, the transition was never easy. A tournament after the French Open, you have to be very careful because the first round can be very dangerous against any player.
"This is the most drastic change in the season, makes success here very difficult."
Lacko moze nawet seta urwac, ale wole te +5.5