Whom do u think is the best Federer or Pete Sampras?

Pete Sampras was considered American No 1 Tennis player holding many of his records. Pete Sampras was born on August 12, 1971 in Washington. He is a former World No. 1 tennis player from the United States. He won a record 14 Grand Slam men's singles titles in 52 appearances. Sampras won the singles title at Wimbledon seven times. He won five singles titles at the U.S. Open. On January 17, 2007, Sampras was inducted into the 2007 class of the International Tennis Hall of Fame.

according to me both and totally different player and it would be foolish to compare both of them. Both of them are very cool and calm when they play the game and you can hardly see them getting angry during the game and this is one thing which separates the two players from the rest. They keep their nerve and very tense situations due to which they can perform up to their potential and win games from very tight and close situations