For Wawrinka , would he recover after a tough -- and contentious -- loss to his higher-profile Swiss at the World Tour Finals in London last week ? Switzerland and France are tied after the opening day of the Davis Cup final in Lille . Hide Caption 1 of 9 Photos:Photos: But then Gael Monfils defeats a potentially ailing Roger Federer in the second singles . More than 27,400 turned up on the day , the largest tennis crowd for a pro match .
Switzerland and France are tied after the opening day of the Davis Cup final in Lille . Hide Caption 1 of 9 Photos:Photos: But then Gael Monfils defeats a potentially ailing Roger Federer in the second singles . More than 27,400 turned up on the day , the largest tennis crowd for a pro match .