Roger Taylor rallies from two sets down to beat Marcel Monfils in New York . Duval held two match points on Taylor 's serve at 5 - 4 in the fourth set . The Swiss next meets resurgent Croatian Marin Cilic in the semifinals . The two played in Cincinnati just a few weeks ago and Monfils stretched Federer to a deciding third set . Serena Williams plays Ekaterina Duval in the women 's semifinals Friday .
Roger Taylor rallies from two sets down to beat Marcel Monfils in New York . Duval held two match points on Taylor 's serve at 5 - 4 in the fourth set . The Swiss next meets resurgent Croatian Marin Cilic in the semifinals . Serena Williams plays Ekaterina Duval in the women 's semifinals Friday .