Top seed Tomas Berdych eased into the last eight of the ATP Portugal Open, posting a 6-3 6-2 victory over Somdev Devverman.
The Czech - in action for the first time since losing in the third round of the Monte Carlo Masters - fired down six aces and registered three breaks of serve to see off Indian Devverman in 75 minutes.
A late addition to the men's draw in Oeiras, Berdych is using the tournament to continue his preparations on clay ahead of the French Open in Paris.
"When I got the last-minute call, it was a great opportunity to come play some more matches and get back into the clay rhythm. I want to be ready for the big events which are coming," he said.
"It was a solid start but we are still in the early stages of the tournament. This was just my first step and I need to keep going. I want to focus on hitting the ball as cleanly as possible."
Berdych will next play the winner of the match between Kazakhstan's Andrey Golubev and Leonardo Mayer of Argentina for a place in the semi-finals.
Milos Raonic saw off Uruguay's Pablo Cuevas 6-3 6-2 to reach the last eight, the second seed from Canada never having to face a break point on his own serve as he triumphed in just over an hour.
"I'm happy with this result and with the level I was able to produce," said Raonic. "This was my first match here and they can be tricky. It can sometimes be difficult to find early momentum."
Raonic next faces either Lukasz Kubot or Carlos Berlocq.
Portugal's Gastao Elias caused an upset, knocking out Spanish fourth seed Guillermo Garcia-Lopez 6-4 3-6 6-2. He had also won in 2013 when the pair met in the quarter-finals of the same event.
The home favourite's reward is a match against Victor Hanescu after the Romanian beat Pablo Carreno Busta of Spain 6-3 4-6 6-3.