Juan Martin del Potro is one step closer to earning a spot in the big show…

The 29-year-old Argentinean tennis star  moved closer to securing the last spot for the season-ending ATP Finals by beating Robin Haase 7-5, 6-4 in the third round at the Paris Masters.

del Potro, who lost to Roger Federer on Sunday in the Swiss Indoors final, is in 10th place in the race to qualify for the tournament.

Only the top eight players will compete in London and there is one place left, to be taken in Paris.

“I would love to reach London once again. It could be a fantastic moment for me,” said del Potro, who was way back in 47th place in the race before the U.S. Open.

“I’m excited to keep improving for this kind of surprise. I love to surprise myself and that’s what I’m doing now.”

del Potro has a tough challenge next, against big-serving John Isner.

The ninth-seeded Isner, last year’s runner-up to Andy Murray, hit 25 aces as he beat sixth-seeded Grigor Dimitrov of Bulgaria 7-6 (10), 5-7, 7-6 (3).