There was a clear sign on Wednesday that Stan Wawrinka has fully recovered from his persistent knee problems. He lost to Sam Querrey 7-5, 6-7 (3), 6-1, but the troublesome joint was strong enough for Wawrinka to smash his racket over it after a missed forehand that cost him a break of serve. Wawrinka had two lots of surgery on his left knee last year to fix a hole in a cartilage but he came through a two-hour match against Querrey and was back out on Court No 1 soon after to play a doubles match with Novak Djokovic. It seems he has healed OK, even if the racket has not. Wawrinka, a three-times grand slam champion, has been faltering since he made his first comeback in January. After six months out it has been a slow process but then it was not long ago that he could barely walk. “You can’t rush it,” the Swiss said. He lost in the second round of the Australian Open and the first round of the French. Here he missed seven set points at 5-4 in the first set, and was then broken to 15 himself. Wawrinka levelled the match by winning the tie‑break in a second set that went with serve but was then broken in the fourth and sixth games of the third set – which was when he decided to let his racket have it. Wawrinka said he felt his knee was finally back moving in the way he wants it to, which it had not been when he was playing in Paris. He also had a warning for Andy Murray, who is making his own comeback. “I think he was moving, playing well, knowing that he’s been away for a year. But if I take my experience, what’s important is how he’s going to be the next match he’s going to play, when he’s going to play, how it’s going to feel,” he said. “My first match was at the Australian Open, and two days after I was not feeling like pain or whatever, but my body was completely off. I lost 6-2, 6-1, 6-2 but I couldn’t really do anything. That’s mentally tough, because you have never experienced that in the past.” Sign up to The Recap, our weekly email of editors’ picks. Querrey, who lost to Marin Cilic in the semi-final at Wimbledon last year, is seeded No 5 and will play him again in the quarter-final here after the No 1 seed beat Gilles Müller 4-6, 6-3, 6-3. On the other side of the draw Frances Tiafoe, a 20-year-old from just outside Washington DC, beat Argentina’s Leonardo Meyer 6-4, 2-6, 6-4 to reach the quarter-finals of an ATP event on grass for the first time. Tiafoe’s family emigrated to the US from Sierra Leone in the late 90s and he learned the game because his father had a job as a caretaker at a junior tennis centre. It is one of the more extraordinary stories on tour. He will play his friend Jérémy Chardy, who beat Daniil Medvedev 7-6 (6), 6-3.<doc-sep>Last updated on .From the section Tennis Former world number three Stan Wawrinka has dropped down the rankings after injury 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. 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.<doc-sep>A three-time Grand Slam champion Stan Wawrinka has dropped to 261st spot in the rankings after failing to defend the points for the final at Roland Garros and we have to go back to August 2003 to find him ranked so low! The Swiss has struggled to find the right form in 2018 so far after missing the second part of 2017 due to a knee injury and surgeries and he came to Queen's with just four wins by his name in the first five months of the year. Today he played like in good old days, toppling Cameron Norrie 6-2 6-3 in 56 minutes to notch his fifth win at Queen's and the first since 2015! Stan was untouchable in his games, blasting 13 aces and losing 12 points in nine service games, never facing a break point to keep the pressure on the other side of the net. Norrie, a former Collegiate star, entered this match with just two professional wins on grass and he couldn't repeat what Stan did in his games, serving at 48% and losing 44% of the points behind his initial shot to face eight break points and lose serve three times. A left-handed Briton saved a break point with a service winner in game two and he fends off another four in game four before Stan converted the fifth one with a forehand return winner that sent him 3-1 up. Wawrinka confirmed the break with three service winners in game five and he wrapped up the opening set in just 27 minutes after another break in game eight when Norrie's backhand landed long. The second set brought nothing new and Stan was in control all the time, serving well and waiting for a chance on the return that would cement the win for him. It came in game four when Norrie sprayed a forehand error and an ace from Stan moved him 4-1 up a few minutes later, marching towards the finish line. Norie reduced the deficit to 5-3 with a volley winner but that was all we saw from him as Stan closed the match with four winners in game eight to propel himself into the next round with a much-needed win that should boost his confidence and ranking position if he wins more matches. 11 years after he made Queen's debut at the age of 18, world number 6 and the top seed in London Marin Cilic has claimed his 25thg win at this tournament, ousting Fernando Verdasco 6-3 6-4 in just 66 minutes for the place in the second round. 2012 champion and a two-time beaten finalist was untouchable on his serve, dropping four points in four service games, holding at love six times and never losing more than one point in his games, mounting the pressure on the other side of the net. The Spaniard couldn't match that level and he struggled on his second serve to face five break points, getting broken once in each set to hit the exit door after the opening round. This was their 14th meeting and the ninth win for Marin, the fourth in a row, finding his rhythm right from the start and creating a break point in game four. Fernando saved it with a beautiful backhand cross court winner and they stayed in touch until game eight when Verdasco wasted three game points to put himself in all kind of troubles. Marin earned a break after forcing an error from his rival at the net and the set was in his hands when he hit a smash winner in the following game for a 6-3. His advantage became even bigger when he broke Verdasco in the third game of the second set when the Spaniard sent a forehand long and that was all he needed to bring the match home, crossing the finish line with another commanding hold in game 10 for his 23rd win of the season. First round results: ↓ SHOW RESULTS ↓ [1]Marin Cilic (CRO) vs Fernando Verdasco (ESP) 6-3 6-4 Gilles Muller (LUX) vs Denis Shapovalov (CAN) 7-6(7) 7-6(6) Stan Wawrinka (SUI) vs [WC]Cameron Norrie (GBR) 6-2 6-3 [5]Sam Querrey (USA) vs [WC]Jay Clarke (GBR) 6-3 6-3 Daniil Medvedev (RUS) vs [6]Jack Sock (USA) 7-5 6-3 Frances Tiafoe (USA) vs Jared Donaldson (USA) 6-4 7-6(4) ALSO READ: ATP Halle: Dominic Thiem and Kei Nishikori are off to winning start<doc-sep>
Sam Querrey will play Marin Cilic in the last eight Stan Wawrinka showed glimpses of his Grand Slam-winning form but was bundled out of the Fever-Tree Championships by former Queen's Club champion Sam Querrey on Wednesday. The Swiss squandered several set points in the opening set and although he took the second on a tiebreak, he capitulated in the decider after dropping serve at 1-2. His frustration boiled over as he buried his racket frame into the lush centre court turf, taking a sizeable divot in the process, before snapping it over his knee. And big-serving American Querrey, champion in 2010, calmly ticked off the next three games to seal a 7-5 6-7 6-1 win and move into the quarter-finals, where he will meet top seed Marin Cilic. Stan Wawrinka lost his temper in the defeat to Querrey Wawrinka's ATP ranking has plummeted to 261 after his first-round loss at the French Open, having reached the final a year ago, but his knees appear strong again after two surgeries last August. He struck the ball with authority in the second set and played a solid tiebreak, but his lack of sharpness told as he was sent packing by the fifth seed. Cilic maintained his mastery over Luxembourg's Gilles Muller, hitting back to win 4-6 6-3 6-3 in their latest big-serving battle. Marin Cilic has a superb record at Queen's Chasing his second Queen's title and his fourth final appearance, Cilic once again frustrated Muller 12 months after beating him in the final set in both the Wimbledon quarter-finals and Queen's semi-finals. The Croatian, who lost last year's Queen's final against Feliciano Lopez, hit 19 aces to 17 from Muller as he made the quarter-finals for the seventh time. Earlier, American prodigy Frances Tiafoe moved into his first ATP Tour grass-court quarter-final with a 6-4 2-6 6-4 win against Argentina's Leonardo Mayer. Tiafoe, ranked 62nd, is looking to add a second ATP title to his maiden success at Delray Beach in February. We have tennis coverage from the ATP Tour as Roger Federer bids for another title at the Gerry Weber Open in Halle. Watch the action live on Sky Sports Arena all this week.