Top-seeded Stanislas Wawrinka rallied to beat 85th-ranked Blaz Kavcic of Slovenia 4-6, 6-2, 6-1 in the second round of the Grand Prix Hassan II on Wednesday.
The 17th-ranked Wawrinka, who won this clay-court event in 2010, served seven aces to Kavcic's none.
It's Wawrinka's third clay-court tournament this year, having reached the final before losing to David Ferrer in Buenos Aires then opening with a loss to Fabio Fognini in Acapulco, Mexico, in February.
In first-round action, seventh-seeded Robin Haase of the Netherlands and Kenny De Schepper of France advanced and will next play each other.
Haase beat Roberto Bautista Agut of Spain 6-3, 2-6, 7-5, and De Schepper eliminated Steve Darcis of Belgium 6-3, 6-4.
Also reaching the quarterfinals were fourth-seeded Benoit Paire, former top-five player Tommy Robredo and Guillermo Garcia-Lopez of Spain.
Paire rallied past Aljaz Bedene of Slovenia, 4-6, 6-4, 6-3; Robredo beat Tobias Kamke of Germany 6-4, 7-5; and Garcia-Lopez defeated Edouard Roger-Vasselin of France 6-7 (4), 7-6 (3), 6-2.
