Daniel Wiffen has become the first athlete from Northern Ireland to win an Olympic gold medal in 36 years in a thrilling 800m freestyle final in Paris

British men's number one Jack Draper faded in the sweltering Paris heat as the nation's interest in the Olympics singles ended in the second round.

Draper, 22, lost 7-6 (7-3) 3-6 2-6 to American seventh seed Taylor Fritz on the Roland Garros clay.

"It was brutal out there," Draper said.

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, 26, 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.

The world number 27 was broken in the sixth game and, from that point, the match quickly slipped away from him.

Continuing to wilt in temperatures of over 30C, Draper lost range with his groundstrokes and power in his serves as Fritz won 10 of the next 13 games to reach the last 16.