London – World number one Rafael Nadal pulled out of the ATP Tour Finals on Monday after struggling with injury in his 7-6 (7/5), 6-7 (4/7), 6-4 defeat at the hands of David Goffin.
The Spaniard exited the Paris Masters earlier this month with a knee injury and appeared to be in pain towards the end of his opening match at the O2 Arena in London.
"No, I am off," said Nadal. "My season is finished. Yeah, I had the commitment with the event, with the city, with myself. I tried hard. I did the thing that I had to do to try to be ready to play. But I am really not ready to play."
"Is about the pain," he added. "I cannot hold with enough power to keep playing. I tried, but seriously it was a miracle to be very close in the score during the match. It really doesn't make sense."
Results from the second day of the ATP Tour Finals at London's O2 Arena on Monday (x denotes seeding):
Pete Sampras Group
Grigor Dimitrov (BUL x6) bt Dominic Thiem (AUT x4) 6-3, 5-7, 7-5
David Goffin (BEL x7) bt Rafael Nadal (ESP x1) 7-6 (7/5), 6-7 (4/7), 6-4
Bob Bryan/Mike Bryan (USA/USA x5) bt Jamie Murray/Bruno Soares (GBR/BRA x4) 7-5, 6-7 (3/7), 10-8
Lukasz Kubot/Marcelo Melo (POL/BRA x1) bt Ivan Dodig/Marcel Granollers (CRO/ESP x7) 7-6 (7/2), 6-4