Rafael Nadal is joining forces with one of his biggest rivals…

The 30-year-old Spanish tennis star, who recently earned a gold medal in Men’s Doubles at the 2016 Rio Games, and Roger Federer say they plan to play doubles together when the Laver Cup debuts next year.

With a combined 31 major titles, Nadal and Federer have committed to the inaugural event, which is an attempt to create a tennis version of golf’s Ryder Cup.

Named for Australian tennis great Rod Laver, the competition was first announced in January.

A team of European players will face off against a group from the rest of the world September 22-24, 2017, in Prague.

Former rivals Bjorn Borg (Europe) and John McEnroe (world team) were announced Wednesday as captains.