Milos Raonic feels "a lot closer" to Grand Slam success

Canadian number one Milos Raonic has insisted that he has the potential to challenge for Grand Slam titles in the future.

The 22-year-old, who will face Philipp Kohlschreiber in the third round of the Australian Open later today, is yet to reach the quarter-finals of any major.

"The thing is, I don't know what the time frame will be," said Raonic. "But it's going to happen, I feel like I'm a lot closer.

"But you can't place time on confidence, on belief, on getting through a few tough matches. But I know as far as ability goes, as far as skill sets go, I'm getting closer and closer.

"I've done a lot of good work, I feel like I'm playing much more improved [tennis] than I was, just really getting match-ready. When that happens, hopefully sooner than later, I think I'll be taking good care of myself."

Raonic, who is currently ranked 15th in the world, won two ATP singles titles in 2012.