Rafael Nadal reaches quarter-finals of Paris Masters

Juan Martin del Potro also progressed to the quarter-finals

"It is not about London, it is about the longer term" he added.

"If you do it right, take care of yourself and have some luck, there is no reason you can't be playing at 100 percent at this tournament at the end of the season".

Thus he advanced to today's quarter-finals of the Paris Masters for the sixth time in as many years in the French capital - though he has never won the title here - and will face Filip Krajinovic, a qualifier.

Top seed Nadal, a victor of 16 Grand Slam titles, had his knee heavily strapped in a battling three-set win against Uruguay's Pablo Cuevas yesterday.

Nearly nothing could separate the rivals in the shortest and longest points but Nadal had a slight advantage in the mid-range rallies, despite hitting a lot of unforced errors.

Nadal's period with the trainer appeared to revive him briefly as he opened up a 3-0 lead and, when Cuevas cancelled out that break advantage in the fifth game, the world number one hit back immediately.

The 31-year-old Nadal has become the oldest player to achieve year-end No. 1 Emirates ATP Ranking since 1973.

If Nadal pulls out of the Tour Finals, it would leave Federer as the only member of the "Big Four" in the year-ending event for the first time since 2005.

"I'm going to do my treatment, do my best to be playing in London, but I can not talk about that now because it is a day that is tough enough for me to pull out from here", Nadal said.

Nadal said that "the pain during the match (on Thursday) was too much".

The injury has thrown his participation at the World Tour Finals at London's O2 Arena, scheduled to run from November 12 to 19, into doubt.

The last spot is now held by Spain's Pablo Carreno Busta, but Argentina's Juan Martin del Potro can beat him to it by reaching the semi-finals at the Palais Omnisports in Bercy.

"I have to pull out".



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