|2018 Fever-Tree Championships on the BBC|
|Venue: Queen's Club, London Dates: 18-24 June|
|Coverage: Watch live on BBC Two, BBC iPlayer, BBC Red Button, Connected TVs, the BBC Sport website and app.|
Stan Wawrinka failed to convert 12 break points as he lost to Sam Querrey in the second round of the Fever-Tree Championships at Queen's.
The Swiss, who has dropped to 261st in the world after injury, was beaten 7-5 6-7 (3-7) 6-1 by the American.
Wawrinka, a three-time Grand Slam champion, wasted seven set points at 5-4 in the first set and only capitalised on one of 13 break points in the match.
Querrey dominated on serve, hitting 25 aces as he closed out victory.
- Watch live BBC TV coverage from Queen's Club
- Evans not awarded Wimbledon wildcard
- Murray on 'emotional' return to tennis
- Live scores, schedule and results
Fifth seed and 2010 champion Querrey will face Croatian top seed Marin Cilic, who came from behind to beat Luxembourg's Gilles Muller 4-6 6-3 6-3.
It was a battle of the big servers as the pair delivered 36 aces between them, with Cilic edging Muller 19-17.
American Frances Tiafoe reached his first ATP grass-court quarter-final with a 6-4 2-6 6-4 win over Leonardo Mayer of Argentina.
In the ATP grass-court tournament in Halle, French Open runner-up and third seed Dominic Thiem was stunned 6-2 7-5 by world number 52 Yuichi Sugita of Japan.
Seventh seed Kei Nishikori was also knocked out, with Russia's Karen Khachanov beating the Japanese player 6-2 6-2 to go through to the quarter-finals.
Khachanov, who reached the fourth round at this year's French Open, will next face Roberto Bautista Agut after the Spanish fourth seed beat Dutchman Robin Haase 4-6 7-5 6-4.
The top seed in Halle is Swiss eight-time Wimbledon champion Roger Federer, who plays Frenchman Benoit Paire on Thursday for a place in the last eight.