Big, tough win for Madison Keys who defeats her American compatriot Coco Gauff 7-6 (4) 4-6 6-4 to reach the quarters in #MadridOpen
13 double faults for Gauff
Keys 3-2 vs Gauff and has beaten her on hard, grass and now clay
#getty
pic.twitter.com/GfKT6v0fgO