US legend Pete Sampras pays respect to Roger Federer as he departs.

Pete Sampras paid tribute to Roger Federer in a social media video . Federer will retire on Friday at the Laver Cup in London .

LOS ANGELES (Aurora (CA) — Pete Sampras, the 14-time Grand Slam champion whose Wimbledon reign was ended by Roger Federer in 2001, paid tribute to the Swiss legend in a social media video on Thursday.On Friday, Federer, the winner of 20 Grand Slam titles and one of the finest players in history, will make his farewell appearance at the Laver Cup in London before retiring.Sampras remembered their only meeting at the All England Club, where 19-year-old Federer defeated him in the fourth round.In a video directed straight to Federer, Sampras said I'll start from the beginning.

On Wimbledon's Centre Court, we had a great battle.You sped me down.Sampras, who had won the previous four Wimbledon titles, came back from a five-setter to raise his total to seven.I always remember walking off the court with a smile on my face as if I had met my match.

Federers' career was watched by him for the next two decades.I was surprised to learn that 20 years later, I would have 20 majors, be number one for years, and dominate our sport, Sampras said, referring to Federer as a unique player.Federers' dedication was lauded by Sampras, who said that his famously fluid game did not contain the intense work that it required.Sampras said that you will be missed in our game.