Novak Djokovic arrives at Wimbledon looking to join Roger Federer and Rafa Nadal on 20 Grand Slam titles and the world No. 1 said he has changed his calendar to ensure his focus is on peaking at the majors at this stage of his career.

Djokovic has participated mainly in Grand Slams and Masters tournaments this year — winning both the Australian Open and French Open — and the 34-year-old said he was fortunate to play his best tennis when it mattered the most.

"Grand Slams are the biggest motivation I have right now at this stage of my career ... I want to try to make the most out of Grand Slams as I possibly can. I'm trying to peak at the majors," Djokovic told reporters.