The smile returned to Laura Robson's face on Wednesday as she won her first main draw Wimbledon match at the third time of asking.

The 17-year-old came from behind to beat Angelique Kerber 4-6 7-6 6-3 on court 16 and set up a showdown with former champion Maria Sharapova which is due to take place on court one today.

It halted what has been a torrid 2011 for the 2008 Wimbledon Girls' champion so far after she missed two months with injury and then split from French coach Patrick Mouratoglou just four days before the start of the Championships.

"I have been smiling for a long time," said Wimbledon-based Robson after her victory.

"I have been happy with my coaching situation for the last week and a bit and I always knew I could play really well.

"But this year I have been injured quite a lot, so it has been difficult to get a good rhythm all the time.

"At the end of last year, I had a really good off-season and I did lots of training then so it was really disappointing after Hopman Cup to be injured for so long, because at that point I felt I was playing really well.

"Then, when I came back I felt like I wasn't as prepared as I could be so that showed in the tournaments I played immediately after my injury.

"But now I am happy with how things are going.

"I am feeling that I am really happy with how I am playing and that definitely translates into more confidence."

It is not just a loss of form and injury that Robson has had to contend with in the last 12 months, having also had a growth spurt that has seen her shoot up to almost six foot and suffer growing pains.

"I am really tall now, I have grown a lot in the last few months," she said.

"It is not anything I have got any control over, you just have to accept the problems that come with it.

"I am pretty happy with my height now and fingers crossed I don't keep growing."

Robson was the third British woman to make the second round following wins for Elena Baltacha and Anne Keothavong, who then went out to number eight seed Petra Kvitova on Wednesday.

Andy Murray was the only British man to make it through the opening round as Daniel Cox, Daniel Evans and James Ward all bowed out at the first hurdle.

The Scot is now in round three as he continues his quest for a first Grand Slam title and faces Ivan Ljubicic tomorrow.