London: British third seed Andy Murray cut Croatian giant Ivo Karlovic down to size with a 7-6 (9/7), 6-4, 5-7, 6-4 win to make the Wimbledon quarter-finals for the eighth successive year.
Murray, the 2013 champion, will face unseeded Canadian Vasek Pospisil for a place in the semi-finals. Karlovic fired 29 aces in the three-hour encounter, but that was well below par for a man who had blasted 136 in his first three rounds.
Murray hit 62 winners to the Croatian's 75 but crucially only nine unforced errors to his rival's 32.
"I came up with some good lobs and passing shots. I just needed to keep him low," said Murray on his tactics of tackling the six feet, 11 inches tall Karlovic.
"It was an incredibly difficult match, it was mentally tiring because you just have to be ready when the chances come."
Murray required seven set points to take the opener and just a single break for the second set. Karlovic saved one match point but was powerless on the second as Murray stretched his career record over the veteran to 6-0.
Wawrinka made to sweat
Meanwhile, French Open champion and fourth seed Stan Wawrinka defeated Belgian 16th seed David Goffin 7-6 (7/3), 7-6 (9/7), 6-4 to also reach the quarter-finals.