According to Andre Agassi, former world number one in men's tennis, Rafa Nadal has a "passion and intensity that rises to every match." Agassi told Business Insider that Nadal is one of the "rare ones" when it comes to mental preparation. Agassi even went so far as to hint that it could be one of the advantages Nadal has over arch rival Roger Federer. Federer has already been dumped out of the 2018 Wimbledon Championships.