All my time in rehab has made me appreciate tennis more than ever.

Athletes have a certain stubbornness that carries us through and makes us do things that people say we can't do.

These were the moments when I was disappointed and frustrated, when I got so low because it seemed all my hard work had been wasted. But the moments passed, and the motivation to go back to rehab was there again.

People get so stressed and nervous and mad.

You know, it doesn't happen that often that you have the crowd support behind you straightaway from the beginning of the match.

Obviously over the years, it's been America, it's been Europe. It's all been very kind of divided between those two continents. It's nice to kind of see that Asia is starting - and especially China - starting to get recognized in this sport, too.

You can wake me up now - these last four weeks in America have been incredible.