Marin Cilic overpowered American teenager Stefan Kozlov to reach the quarter-finals of the Aegon Championships at Queen's Club on Thursday.
Croatian Cilic, winner of the prestigious Wimbledon warm-up event in 2012, crushed Kozlov 6-0 6-4 and will now take on unseeded Donald Young in the quarter-finals on Friday.
The former US Open champion cruised through the first set in 24 minutes but was given more of a workout in the second.
But 19-year-old Kozlov never hinted at breaking the Cilic serve, which offered up only seven points to the American during the 65-minute contest.
Cilic is the tournament favourite following the exits of top seed and five-time winner Andy Murray, Swiss world No 3 Stan Wawrinka and 2016 Wimbledon runner-up Milos Raonic.
Meanwhile, 2010 champion Sam Querrey defeated Murray's conqueror Jordan Thompson in a hard-fought three-set battle.
Querrey beat the Australian 7-6 (7-3) 3-6 6-3 to set up a quarter-final clash with Gilles Muller, who knocked out Jo-Wilfried Tsonga on Wednesday.
Elsewhere, Daniil Medvedev is through to face Grigor Dimitrov after beating Thanasi Kokkinakis 6-2 6-2, while Feliciano Lopez got the better of Jeremy Chardy - winning 6-1 7-6 (7-4). The Spaniard faces Tomas Berdych in the quarters next.
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