But then in 2004 March, Federer was upset by a 17-year-old Nadal, who won 6-3 6-3 their Miami Open meeting. The following year, the former 20-time Grand Slam champion got his revenge by winning their second meeting that also came in Miami.

Rafael Nadal's tennis career is now over, but Roger Federer and many others have been called out for not being there for the Spaniard's final match

Tennis legend Roger Federer wrote a heartfelt letter to Rafael Nadal on Tuesday before the Spanish star joins him in retirement. Nadal is participating in the Davis Cup in Malaga, Spain this week before saying goodbye to the sport he has played professionally since 2001.