Matteo Berrettini will face Rafael Nadal in the US Open semi-final on Friday night.
Browsing: Gael Monfils
Federer was in blinding form during the first set, which blazed by in 16 minutes.
It was in the opening round of the Madrid Open.
French Pierre-Hugues Herbert was 6-2 3-1 up when Monfils retired due to a back injury. Monfils, who debuted at Miami in 2005, reached the quarter-finals at the event in 2016.
It was the Frenchman’s first Qatar title despite having played in three previous finals, stretching back more than a decade, and he is the first wildcard to win in Doha since compatriot Nicolas Escude triumphed back in 2004.
The News Agency of Nigeria reports that former champion Nadal had not reached the last eight in a major since the 2015 French Open