Juan Martin Del Porto fought very hard to earn himself a spot in the last four of the U S Open 2017. After winning the first set, Del Porto seemed to have lost focus in the second and Roger Federer got back on the board and made it one set all. In the third set however, Del Porto seemed to get back on track, winning 7-6 and dominated the fourth and final set with a 6-4 victory.
The mens semi-final: Rafael Nadal takes on Juan Martin Del Porto and Kevin Anderson will play 12th seed Pablo Carreno Busta.
Madison Keys become the fourth American woman in the final four, completing an All-American semi-final. She beat Kaia Kanepi 6-3 6-3 in a quarter final match on Wednesday evening.
The womens semi-finals: Venus Williams vs Sloane Stephens and Coco Vandeweghe vs Madison Keys – will take place at 01:00am on Friday morning CAT