Barcelona, April 27:

Top-seeded Rafael Nadal beat fellow Spaniard Feliciano Lopez 6-4, 6-2 in the second round at the Open Seat Godo, his 43rd straight win on clay.

Earlier, Ivo Karlovic from Croatia upset second-seeded Nikolay Davydenko 6-7 (7), 7-5, 6-4.

The second-ranked Nadal converted three of four break chances in the second set to avenge a loss in 2003 to Lopez in their only other meeting.

Nadal, who is aiming to become the first player since Thomas Muster in 1995-96 to win back-to-back titles here, will now play qualifier Ivan Navarro Pastor for a spot in the quarter-finals.

Former champions Tommy Robredo, Juan Carlos Ferrero and Albert Costa are also through to the third round.

Tenth-seeded Ferrero defeated Alberto Martin 6-4, 7-6 (1); sixth-seeded Robredo beat Italy’s Potito Starace 6-4, 6-0; and Costa topped eighth-seeded Dominik Hrbaty of Slovakia 6-3, 7-5.

Albert Portas beat ninth-seeded Tomas Berdych 7-6 (6), 6-3; Evgeny Korolev of Russia beat Fernando Vicente of Spain 6-3, 6-0; and Paul-Henri Mathieu downed Carlos Cuadrado 7-6 (4), 6-4.