Rafael Nadal secured a place in the third round of the Madrid Open with a straight-sets win over Nikolay Davydenko.
The second-seeded Spaniard broke his opponent four times en route to a 6-2 6-2 victory in one hour and 20 minutes.
Nadal was joined in the last 16 by compatriot and fifth seed David Ferrer, who overcame Radek Stepanek 7-6 (7/4) 6-2 on the controversial blue clay.
Gael Monfils, seeded 12th, progressed after Russian opponent Igor Andreev retired hurt when trailing 6-3 1-0.
Another seed, Alexandr Dolgopolov was made to work much harder for his last-16 spot, coming from behind to see off Andreas Seppi 6-7 (5/7) 7-6 (7/5) 6-3.
However, eighth seed John Isner fell at the second hurdle, beaten 7-6 (7/4) 7-6 (7/3) by Croatia's Marin Cilic.
Swiss Stanislas Wawrinka needed just an hour to overcome Jurgen Melzer 6-1 6-4, and will now face top seed and defending champion Novak Djokovic.
