Former Brazilian tennis player Flavio Saretta says it is “surreal” what Novak Djokovic, Rafael Nadal and Roger Federer have accomplished. The Big Three have dominated the game for the past decade and a half and they are the three players with the most Grand Slam success in tennis history. Nadal owns a record 21 Grand Slams, while Djokovic and Federer each have 20 Majors. “At the time Pete Sampras was the record holder and had 14 Grand Slams it was a surreal thing to imagine that someone would win that.We have three guys in this generation with 20 Grand Slams [Nadal won 21st after this interview]. they did. And with chances of winning more. I think that 50 years from now, the compa …