Roger Federer rallies from two sets down to beat Gael Monfils in New York . The Swiss star will face the winner of Sunday's final between Rafael Nadal and Andy Murray at Flushing Meadows. The country 's wait for a men 's grand slam singles champion will extend to 32 years . The Swiss next meets resurgent Croatian Marin Cilic in the semifinals . Serena Williams plays Ekaterina Makarova in the women 's semifinals Friday .
Roger Federer rallies from two sets down to beat Gael Monfils in New York . The Swiss star will face the winner of Sunday's final between Rafael Nadal and Andy Murray at Flushing Meadows. The Swiss next meets resurgent Croatian Marin Cilic in the semifinals . Serena Williams plays Ekaterina Makarova in the women 's semifinals Friday .