Fourth seed Marin Cilic booked his place in the quarter-finals of the Aegon Championships for the sixth time on Thursday.
The Croat was simply too good for Stefan Kozlov, needing one hour to defeat the American qualifier 6-0, 6-4.
Cilic was completely dominant on serve and lost just seven points in the whole match.
"I don't feel any extra pressure or any more confidence," said the former US Open winner after the match.
"I'm just focused on my own things, my part of the court, trying to do that well. I've been playing well really since the clay season started… But, I still have to work to improve some areas of my game and maybe get better day after day."
Next up, Cilic faces another American, Donald Young, in the last eight.
Elsewhere, Sam Querrey defeated Jordan Thompson (who notably knocked out top seed Andy Murray in the first round) 7-6(3), 3-6, 6-3 in a touch over two hours.
Russia's Daniil Medvedev and Feliciano Lopez of Spain also advanced to the quarter-finals following their straight set wins over Thanasi Kokkinakis and Jeremy chardy respectively.
Friday’s @QueensTennis QFs ⬇️
??Querrey v Muller??
??Cilic v Young??
??Dimitrov v Medvedev??
??Berdych v Lopez??#AegonChampionships
— Tennis TV (@TennisTV) June 22, 2017