Ivan Lendl is quietly confident about Andy Murray's chances of adding to his one Grand Slam title in 2013. The Scot ended his long wait for a major success at the US Open in September, beating defending champion Novak Djokovic in a five-set thriller to become the first British male to win a Grand Slam in 76 years. The Flushing Meadows triumph came on the back of a successful campaign on grass, with Murray impressing at Wimbledon on his way to the championship final and Olympic gold. Murray also reached the Australian Open last four at the beginning of 2012, and is a two-time finalist at the event. He is one of the favourites to kick-off next year with a Grand Slam win, but his coach is keen to keep the British number one grounded. "The goal is to win in Melbourne. But tennis is difficult with Djokovic, (Roger) Federer, (Rafa) Nadal and Andy all very good at the moment. Yes, he has a chance but I can't make any predictions," Lendl was quoted as saying by several sport updates. Murray enjoyed an excellent first season under the tutelage of Lendl and will improve even more in 2013, according to the Czech-born coach. "I now have more of an understanding about what makes him tick and we can build successfully on that. There is a lot to look forward to next year," added Lendl. One area Murray could improve on is his clay-court game where he is always an outsider to the likes of Nadal in the odds betting. However, Lendl believes he has all the attributes to enjoy success on the surface. "No-one has won the French Open without having enjoyed a good clay-court season. But if he works on aspects of his game I want him to improve, then he can do it," he said.