Two titans at the top of their game - riproaring rivalries are part of what makes tennis so enthralling.
The delicately-balanced head-to-heads, the tussle to come out on top - players pick up plenty of rivals throughout their careers.
Whether they're friends who hate to be on opposite sides of the net, or if they've come up through juniors together and know each other's games exceptionally well, or if they represent different generations facing off for supremacy - which are your favorite rivalries of the decade?
Check out our choices for the Top 10 Rivalries of the last ten years!
