Federer saves 2 match points after breaking back in the 3rd set to beat Monfils in Madrid
He will face Thiem in quarters on Friday.
Madrid 
Non classé
68e, 825 points
Non classé
Federer R • 4
Monfils G • 15
6
4
7
0
6
6
Federer R • 4
Thiem D • 5
6
6
4
3
7
6