French Open champion Rafael Nadal marked his return to grass in style with an emphatic 7-5 6-1 win over Slovakia's Lukas Lacko in the second round of the Gerry Weber Open in Halle.
Nadal's 75-minute cruise was his first win at the tournament since losing in the first round to Alexander Waske in 2005, and set up a quarter-final clash with reigning champion Philipp Kohlschreiber.
Home favourite Kohlschreiber, seeded eighth, fired 11 aces as he defeated Poland's Lukasz Kubot 6-7 (5/7) 6-1 6-3, breaking his opponent four times to win in just over four hours.
Five-times former champion Roger Federer also reached the last eight but the Swiss second seed did not have it all his own way en route to defeating Germany's Florian Mayer 6-4 7-5.
One solitary break in each set proved enough for Federer, who only had to save one break point of his own, as he advanced in one hour and 14 minutes to a last eight meeting with fifth seed Milos Raonic.
In the remaining second round tie played on Thursday, German veteran Tommy Haas delighted his home fans by rolling back the years to score a 6-3 6-4 win over Spanish sixth seed Marcel Granollers.