Fernando Verdasco progressed to the third round of the Monte Carlo Masters after he came from a set down to see off Ivan Dodig 3-6 6-3 6-1.
Next up for Verdasco is a meeting with Frenchman Jo-Wilfried Tsonga, who defeated Germany's Philipp Kohlschreiber 6-2 6-4.
In the first round, seeds Feliciano Lopez and Florian Mayer both fell to defeat.
Spanish 10th seed Lopez was beaten 6-1 6-4 by Stanislas Wawrinka and 14th seed Mayer went down 3-6 6-1 6-3 to qualifier Mikhail Kukushkin.
Juan Monaco, seeded 11, also fell as he was forced to retire at 7-5 0-6 2-3 against Robin Haase, but 12th seed Kei Nishikori progressed with a 6-2 7-5 win over Spain's Albert Ramos.
Unseeded Croatian Marin Cilic enjoyed a 6-3 6-4 win over Italy's Simone Bolelli, while there were also wins for Andreas Seppi, Fabio Fognini, Potito Starace, Thomaz Bellucci, Pablo Andujar and Filippo Volandri.
