Nishikori unconcerned by wrist injury at Aus Open

The Japanese seventh seed clinched a 7-5 2-6 6-3 6-4 win over Spaniard Garcia-Lopez in Melbourne on Friday.

While he required treatment on a wrist concern during his victory, Nishikori said he was confident it would be no problem.

"It was little bit sore in the beginning, but after the treatment it was fine. I'm sure it's going to be OK," he said.

"It was a really tough match. There were many long rallies. I have to give a lot of credit to him, because he was hitting really hard.

"I thought he was going to hit more spin, but he was hitting a lot of flat balls and it was going in. So it was tough to play.

"But I started playing much better in the third and fourth [sets]. I tried to dictate a little more, tried to step in and use more forehands, and I think I was able to come in many times today. So that was working, too."

Nishikori believes he may have suffered a recurrence of a wrist injury he battled in 2014.

"I had it two years ago, I think. Yeah, I needed to tape my wrist because, you know, I have some issues there," he said.

"So maybe it's came back a little bit, but it should be OK for the next one."