Greg Rusedski suffered a desperately disappointing defeat to Gregory Carraz in round one of the US Open.
The British number two struggled with every part of his game as he went down 6-4 4-6 6-2 5-7 6-4 to the unseeded Frenchman.
"I took the wrong approach," said the 1997 runner-up. "I should have been more consistent."
Carraz produced a performance that belied his world ranking of 100, serving superbly and following up at every opportunity with solid volleys.
But he was helped by an unusually tentative Rusedski, who failed to find the usual sting on serve and only made it to five sets through sheer determination.
Carraz broke for the first time in the seventh game before going on to serve out for the set - and remained in control until serving at 4-5 in the second.
Rusedski's best moment of the match came with a stunning backhand pass that set up the break, although a dubious line call clearly helped.
It proved to be only a minor disruption for the Frenchman, who continued storming to the net whenever possible and broke twice in the third set.
Normally renowned for his fighting qualities, Rusedski looked a forlorn figure in the fourth and tamely gave up another break before turning the match on its head.
From a break down, the Briton recovered to level the match and looked to have the momentum going into the fifth.
But, after saving a break point in the second game, Carraz appeared the fitter player as he broke in the seventh game, with Rusedski throwing in yet another double fault.
This time Carraz did not suffer from nerves - and he calmly served out for the best win of his career.