8. Half Clay Half Grass
Early on in their epic rivalry, Roger Federer and Rafael Nadal each held serve, so to speak, when facing each other on their respective favorite surfaces - grass for the Swiss stylist and clay for the Man from Mallorca. By the spring of 2007, many followers of tennis began to ask whether Nadal would ever win at Wimbledon as long as Roger was King of those storied lawns, or if Federer would ever punch through and claim that elusive title at Roland Garros with the immovable Nadal standing in his way.
With both champions being great sports and even greater ambassadors for the game, the duo agreed to participate in an exhibition match in Nadal's native Mallorca. The unusual quality to the encounter was that half the court was grass and the other half clay. With players changing shoes at changeovers to adapt to the bizarre conditions, the pair put on quite a show for those lucky attendees, with Nadal taking a tight 7-5, 4-6, 7-6(10) decision.
Both would also prove that they were true all-court players as Nadal and Federer accomplished that rarest of feat, claiming all four Slams on three different surfaces with Nadal winning the 2008 Wimbledon and Federer the 2009 French.