Raonic had early problems before he recovered under a closed roof to win 7-6 (8/6), 3-6, 6-4, 6-1 against the 13th-seeded Bautista Agut in two hours, 52 minutes on Hisense Arena.
The big-serving Canadian will face either 14-time Grand Slam champion Rafael Nadal or French sixth seed Gael Monfils in the last eight.
He is 3-3 in career matches with Monfils, but trails Nadal 6-2 in their previous meetings.
It is the third straight year Raonic has reached the quarter-finals in Australia, and it is also his sixth quarter-final at a major, the most by any Canadian player.
Raonic, who stretched his record to 5-0 over the Spaniard, served up 33 aces but also had his issues with his serve as he was broken three times, along with nine double faults.
Raonic saved a break point at 4-4 in the third set with a blistering forehand winner, and Bautista Agut double-faulted in the following game to give the Canadian a break and set point.
Raonic then went on a run of seven games as the stadium roof was closed because of rain, changing the complexion of the match as the Canadian’s serve dominated.
source: sports.inquirer.net
