Andy Murray aims to end the year on a high after a career-best season in which he landed Olympic gold and the US Open title.

The 25-year-old from Dunblane starts his defence of the Japan Open title this week in Tokyo, where he faces Frenchman Gael Monfils.

"It will be a tough first match," said the Scot. "I've played him five times and lost to him a couple of times. He's a great athlete."

Murray said he was hungry for more success before looking back at a job well done in 2012.

"I have good memories (of Tokyo) from last year," said the world No.3, who beat Rafa Nadal in the final.

"I'd like to play well at the Tour Finals in London. I didn't have the chance to do that last year (because of injury).

"The top of the men's game is very strong so if you want to improve your ranking and win tournaments you need to keep improving your game."