'S-HERTOGENBOSCH (NETHERLANDS) - Australian second seed Bernard Tomic served up 14 aces but was still knocked out of the 's-Hertogenbosch grass court tournament by two-time champion Nicolas Mahut on Friday.
Australia's Bernard Tomic returns the ball during the men's second round match at the Roland Garros 2016 French Tennis Open in Paris on May 26, 2016
Mahut, the 2013 and 2015 champion at the Wimbledon warm-up event, won 6-7(5/7), 6-4, 6-2 to set up a semi-final clash against America's Sam Querrey.
Victory for Mahut over Tomic was also revenge for a loss he suffered in their only other meeting in Brisbane in January.
“It is really difficult to play against Bernard on grass, so I am happy with the way I was able to come back after the first set,” Mahut said.
“I served much better and the early break in the second set gave me a lot of confidence."
Luxembourg's Gilles Muller fired 17 aces in a 4-6, 6-4, 7-6 (7/5) upset of top-seeded Spaniard David Ferrer of Spain.
The big left-hander saved four of five break points and secured victory on his third match point.
He will face Ivo Karlovic in the semi-finals after the Croatian third seed beat France's Adrian Mannarino 6-3, 6-4.
Fifth seed Querrey had earlier defeated compatriot Stefan Kozlov 6-3, 6-0.
In the women's event, top seed Belinda Bencic edged Swiss teammate Viktorija Golubic 7-6 (8/6), 7-6 (7/2).