John McEnroe says Andy Murray could overtake Tim Henman to become Britain's number one by Wimbledon next year. Murray has risen from outside the top 400 to 70 in the world while Henman has had his worst season for many years.
"Tim Henman has had a horrible year and that has got to be a pretty bitter pill to swallow," said McEnroe.
"Greg Rusedski's had a good year but he can't say he is on the upside of his career. With Murray the sky's the limit. I see it happening soon."
 | I know this is not out of my depth now and I am just looking forward to starting again next year |
Murray's remarkable breakthrough season ended with defeat at the hands of Chile's Fernando Gonzalez in the Swiss Indoors.
But the young Scot admitted it had been a year of huge progress.
"The main thing I have to take away from this year is that I have played against two or three top-10 players and have gone the distance," said Murray.
"Pretty much all the matches I have lost in ATP tournaments have been very close so I know this is not out of my depth now and I am just looking forward to starting again next year."
He picked out playing in the Thailand Open final against Roger Federer as the high point of the season.
"I won against a couple of very good players in Robby Ginepri - who had just been to the semis of the US Open - and Paradorn Srichaphan - in the city where he was born - and then to play against Federer in the final was very special," he told the BBC.