Gael Monfils of France returns the ball to Roger Federer of Switzerland during the first day’s single match of the Davis Cup World Final between France and Switzerland at the Pierre Mauroy Stadium in Lille, France, 21 November 2014. EPA/YOAN VALAT

Gael Monfils of France reacts after defeating Roger Federer of Switzerland during the first day’s single match of the Davis Cup World Final at the Pierre Mauroy Stadium in Lille, France, 21 November 2014. EPA/YOAN VALAT

Gael Monfils of France serves the ball to Roger Federer of Switzerland during the first day’s single match of the Davis Cup World Final between France and Switzerland at the Pierre Mauroy Stadium in Lille, France, 21 November 2014. EPA/YOAN VALAT

Gael Monfils of France reacts after wining the first set against Roger Federer of Switzerland during the second single match of the Davis Cup Final match between France and Switzerland at the Stadium Pierre Mauroy in Lille, France, 21 November 2014. EPA/SALVATORE DI NOLFI

Gael Monfils of France returns a ball in front of French Davis Cup Team captain Arnaud Clement (L) during a training session of the French Davis Cup Team, prior the Davis Cup Final game between France and Switzerland, in Marc-en-Barroeul near Lille, France, 17 November 2014. The Davis Cup World Group Final France vs Switzerland will take place from 21 to November 23. EPA/SALVATORE DI NOLFI