The person who stumbled Roger Federer in the Quarterfinals was the "giant" Del Potro.
The balance of set 1 was broken in the 11th game when Del Potro took a dangerous shot to eliminate Fedex's shot to get the first break. Taking advantage of that, Del Potro headed straight to a 7-5 victory in this set.
The wind changed direction in set 2 when Federer took the initiative. "Accelerator" had an early break from game 4 and advanced to a 6-3 victory, thereby balancing the score of the match.
In set 3, the drama was boosted when Del Potro had a break in game 2, but Federer seemed to immediately win it back to balance the score 4-4. At the end of set 3, the two sides made no more mistakes, forcing the match to enter a brain-breaking tie series. Here, Del Potro showed more difficulty to win close to 10-8.
Up to now, Federer has clearly shown the burden of age, while Del Potro is still very energetic. After breaking a delicious smash, Fedex had to stand at the counter to score the winner to win the break. Del Potro made no mistake to quickly end set 4 with a 6-4 victory.
In the end, Del Potro defeated Federer after 4 sets with the scores of 7-5, 3-6, 7-6 and 6-4. He made his name in the semi-finals and destroyed fans' dreams of the classic match between Roger Federer and Rafael Nadal. Before that, Rafa easily defeated Andrey Rublev after only 3 sets with the scores of 6-1, 6-2 and 6-2.
This year's women's singles event witnessed the coronation of the host country's players when all 4 players participating in the semi-finals were US citizens. After Venus Williams and sloane Stephens, Madison Keys and CoCo Vandeweghe also continued with surprising victories over Kaia Kanepi and Karolina Pliskova with the same score of 2-0.
