This year, Roger Federer has joined some exclusive clubs. After winning the French Open back in May, Federer became only the sixth player to win all four Grand Slam Championships. Then in July, he defeated Andy Roddick in the Wimbledon Finals to win his record 15th Grand Slam title. The win catapulted him ahead of previous record holder Pete Sampras who had 14 Grand Slam titles under his belt. So, does this make Roger Federer the best ever?