The second seed and world No.6 will next meet Pablo Andujar of Spain in the ATP 500 clay court event on Thursday, reports Xinhua news agency.
France's Gael Monfils also advanced with an entertaining 7-5, 3-6, 7-5 win over Horacio Zeballos of Argentina.
Monfils will meet last month's Australian Open runner up Marin Cilic of Croatia in the round of 16 at the Jockey Club Brasileiro.
Spanish third seed Pablo Carreno Busta was another winner on the second day of the tournament, breezing past Italy's Marco Cecchinato 6-4, 6-1.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
