Del Potro on wrist injury: 'It's nothing different'

Juan Martin del Potro says the wrist discomfort he experienced during his second-round match in Miami are part of the effects of surgery, and not a new injury.

The Argentine, who fell to Horacio Zeballos in straight sets, called the trainer in the second set to look at the same left wrist on which he has had three procedures. Del Potro indicated he had been experiencing pain regularly since returning a few weeks ago, but said it had increased since his first match at the tournament.

"It's nothing new, nothing different," he told press at Miami following the match. "But I already know these things going to happen very often to me.

"I hope nothing dangerous. I mean, I will see what's going on after today and see if I can practice tomorrow, if I can hit again like a little backhand."

The former U.S. Open champion is concentrating on simply improving his game and has been visibly restricted on his backhand.

"My biggest opponent is just myself," he said. "They said before this is a long road to get better. Not to play well or to win matches, just to get better and to play tennis again. I'm looking forward for that. For me it's like surprise when I win a match in this moment because I'm not 100 percent yet."

Though next scheduled to play Monte Carlo, del Potro did not specify where he would play next, but said he was happy with the way his comeback has been going. "I already played three tournaments and I won five matches," he said. "If I have another tournament very soon would be great for me."

Del Potro would be a wild card entry at the Monte Carlo Masters.