British men's number one Jack Draper faded in the sweltering Paris heat as the nation's interest in the Olympics singles ended.
Draper, 22, lost 7-6 (7-3) 3-6 2-6 to American seventh seed Taylor Fritz on the Roland Garros clay.
After a strong and aggressive start which led to the first set, Draper was unable to take any of six break points in the third game of the second set.
Fritz hanging on proved to be pivotal.
The energy seemed to be sapped out of Draper, who has struggled in the early part of his career with fitness problems, by a lengthy rally in the fourth game.