Johannesburg, Oct 18 : Spanish tennis ace Rafael Nadal has said that appendicitis might force him to miss the season-ending ATP World Tour Finals next month.

The injury-plagued Spaniard, who has only recently returned from a wrist problem, is on antibiotics and hoping to delay surgery for appendicitis until the end of the season. However, with the eight-man London showpiece looming, the world number three said that he was not certain he would be there.

Nadal said that he has had weeks of injury so it was not an easy season for him at the end, adding that he has to do the surgery but he has to find the right moment, Sport24 reported.

The 14-times grand slam champion said that he needs to see how things go and how his body accepts the antibiotics, so he added that after all the things that have happened over the last few weeks, he would see what happens now.

Nadal also said that he would try to do his best to be in London but added that he cannot say, and does not know a hundred percent.

Nadal, along with Novak Djokovic , Roger Federer and Stanislas Wawrinka, has already qualified for the tournament with U. S. Open champion Marin Cilic also virtually guaranteed a debut appearance.

The likes of Andy Murray, Tomas Berdych, David Ferrer and Kei Nishikori are scrambling for the remaining three spots, the report added. (ANI)