Tim Henman begins his preparations for the Olympics this week with the uncomfortable realisation that the world's best tennis players reckon they have got his number.

The stark message to come out of his third-round US Open defeat against Richard Krajicek - the fourth time this year the Oxfordshire player had lost in five sets in a Grand Slam -was the fact that the top guys know how to beat him.

Put him under pressure at the crucial moment and you are likely to be rewarded with a double fault is the locker room 'knowledge' which Krajicek used to such devastating effect in Arthur Ashe stadium in the early hours of yesterday morning.

As it happened it was borne out in dramatic fashion Henman cracking on match point against him with a weak second serve which struck the net cord and spooned over the service line to hand the big Dutchman victory.

It was the worst of 17 double faults which marred Henman's game in what was an otherwise commendable display of courage and style.

I know he can double fault, said Krajicek. I was trying to put him under pressure, maybe he would double fault and he did.

"I can't really have too many complaints, said Henman. I played some really good tennis. In the big picture I have got to start winning the small tournaments. At the moment I feel frustration, anger, whatever, but you've got to learn from it. Twelve months ago I didn't have a clear direction of what I was trying to do. Now I'm channelling my efforts in the right way. The result is not what I wanted, but playing in that atmosphere and that sort of stadium is what it is all about.