The 37-year-old Swiss can clinch a record-extending 21st major when he manages to break with this world number one’s stranglehold. Four-time Wimbledon winner and defending champion Djokovic appreciates a 25-22 edge in career meetings, extending back 13 years. The Serb has won 14 of their last 20 meetings and eight of the last 10. Federer has lost all four of their latest meetings at the Slams and it is now seven years because he triumphed over the 32-year-old in the majors. That has been 2012 in four sets at a Wimbledon semi-final.