Former Wimbledon champion Pat Cash believes Andy Murray has matured in 2012 and could win as many as three Grand Slams next year.
Murray has made huge strides in his results and scores this year
under the tutelage of Ivan Lendl – winning Olympic gold at the London Games before breaking his Grand Slam duck at the US Open in September.
Cash feels Lendl has helped develop Murray as a person and was a big factor in his win at Flushing Meadows.
"It's evident that he's grown up, and that he has taken control of the things that he can. You can't control how the other guy hits the ball, but you can control your attitude," Cash told The Tennis Space.
"For a while it looked as though it wasn't going to happen against Djokovic in the US Open final, but he took the fifth set, and now hopefully he can be more relaxed about his game, go for his shots, and hopefully win more Grand Slams."
Murray has been in action at the Paris Masters, where he fell in the third round to big-hitting Pole Jerzy Janowicz.
The Scot joins top seed Novak Djokovic in making an early exit in the French capital, while Roger Federer chose not to compete.
With Paris and the ATP World Tour Finals being played back-to-back for the first time, it appears the leading players have one eye on the season-ending event at the O2 Arena, where Murray is among the favourites in the online betting
Cash looked beyond London and predicted one player dominating in 2013, should Rafael Nadal continue his struggles with injury.
"It would be sad, now that Murray is at his peak, if Nadal isn't around competing," Cash added.
"I think one of Djokovic, Federer or Murray could win three Grand Slams. I can see that happening. Not four, though."