del Potro's London dream is over
John Isner has ended Juan Martin del Potro’s London bid at the quarter-final stage of the Rolex Paris Masters
Victory for the Argentine would have all but sealed his place at the season-finale, however he came up short against the big-serving American.
Isner, who reached the final in the French capital last year, was a 6-4 6-7(5) 6-4 winner and he is now a serious contender to qualify for the World Tour Finals. If he lifts his first Masters trophy on Sunday, he will dislodge Pablo Carreno Busta and claim the last remaining spot available.
The 32-year-old would have expected to face Rafael Nadal in the semi-finals, but the Spaniard has pulled out the tournament citing a knee injury. The 16-time major champion is now a doubt for London and Filip Krajinovic, ranked No.77 in the world, is into last four of a Masters for the first time.
Commenting on his withdrawal, the world No.1 said: "I have to pull out. Of course, it's a very tough decision for me, especially here in Paris, which has been the most important city in my career without a doubt.
"It's a tough situation but I tried my best. I had treatment last night to try and play today. I am here to win so if I see that I don't have that chance, it's not a good idea to keep trying.
"It's not about London, it's about the longer term. It is important to play tennis as long as possible.”