Jo-Wilfried Tsonga of France returns a ball to Stanislas Wawrinka of Switzerland, during the first single match of the Davis Cup Final between France and Switzerland, at the Stadium Pierre Mauroy in Lille, France, 21 November 2014. EPA/SALVATORE DI NOLFI

Stanislas Wawrinka of Switzerland celebrates a point against Jo-Wilfried Tsonga of France during their singles match on the first day of the Davis Cup World Group Final between France and Switzerland at the Pierre Mauroy Stadium in Lille, France, 21 November 2014. EPA/YOAN VALAT

Gael Monfils of France returns a ball to Roger Federer of Switzerland during the second single match of the Davis Cup Final between France and Switzerland at the Stadium Pierre Mauroy in Lille, France, 21 November 2014. EPA/SALVATORE DI NOLFI

General view of the match between Gael Monfils (R) of France and Roger Federer (L) 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

Roger Federer of Switzerland reacts 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

Stanislas Wawrinka of Switzerland, returns a ball to Jo-Wilfried Tsonga of France during their singles match on the first day of the Davis Cup World Group Final between France and Switzerland at the Pierre Mauroy Stadium in Lille, France, 21 November 2014. EPA/SALVATORE DI NOLFI

Roger Federer of Switzerland returns a ball to Gael Monfils of France 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