Top-seeded Gael Monfils beat No. 11 John Isner 6-4, 3-6, 7-6 (6) in a rain-delayed match Saturday night to advance to the finals of the Legg Mason Tennis Classic.
Monfils will meet Radek Stepanek of the Czech Republic on Sunday. Stepanek defeated Donald Young 6-3, 6-3.
The native of France, ranked seventh in the world, won the tiebreaker when the 6-foot-9 inch Isner hit a forehand into the net.
Isner staved off two match points in the 10th game. On the second, Monfils felt Isner's serve was wide, but the replay machine failed to operate, and the call stood.
The start of the match was delayed nearly two hours. There were two lengthy rain delays and the match finally ended at 1:15 a.m.