TRINEC, Czech Republic — Wimbledon doubles champions Nicolas Mahut and Pierre-Hugues Herbert had to fight hard to defeat Lukas Rosol and Radek Stepanek 6-1, 3-6, 6-3, 4-6, 6-4 to give France a 2-1 lead over the Czech Republic in the Davis Cup quarterfinals on Saturday. A week after beating Julien Benneteau and Edouard Roger-Vasselin in