Stuttgart - Guillermo Garcia-Lopez has defeated Italian qualifier Marco Cecchinato 6-4, 1-6, 7-5 for a second-round meeting with Swiss qualifier Yann Marti at the Mercedes Cup on Wednesday.
The sixth-seeded Spaniard saved eight of the 12 break points he faced before prevailing in just over two hours.
Marti defeated compatriot Henri Laaksonen 7-5, 6-4.
Play at the clay-court event, washed out on Tuesday, was delayed until 4:45 p.m. local time due to more rain.
Another Spaniard, Daniel Gimeno-Traver, defeated Germany's Peter Gojowczyk 7-5, 6-3 for a clash against compatriot Feliciano Lopez, the No. 4 seed, who was awarded a first-round bye.
Louk Sorensen defeated Dutchman Igor Sijsling 6-4, 6-1. The Irishman will next face the third-seeded Roberto Bautista Agut of Spain.
Benjamin Becker of Germany beat Benoit Paire of France 3-6, 6-2, 6-2 to line up eighth-seeded Federico Delbonis of Argentina.
The seventh-seeded Santiago Giraldo defeated Croatian qualifier Mate Delic 6-4, 6-2. The Colombian will next meet Russian qualifier Philipp Davydenko, who beat Blaz Rola of Slovenia 6-4, 7-6 (8).
Also, Lukas Rosol defeated wild card Alexander Zverev 7-6 (7), 7-6 (9) and will face another German in the second round.
The 48th-ranked Czech will next play either the fifth-seeded Philipp Kohlschreiber or compatriot Jan-Lennard Struff.
Results from the third day of the Stuttgart ATP tournament on Wednesday (x denotes seeding):
Philip Davydenko (RUS) bt Blaz Rola (SLO) 6-4, 7-6 (10/8)
Santiago Giraldo (COL x7) bt Mate Delic (CRO) 6-4, 6-2
Louk Sorensen (IRL) bt Igor Sijsling (NED) 6-4, 6-1
Yann Marti (SUI) bt Henri Laaksonen (SUI) 7-5, 6-4
Guillermo Garca-Lpez (ESP x6) bt Marco Cecchinato (ITA) 6-4, 1-6, 7-5
Luks Rosol (CZE) bt Alexander Zverev (GER) 7-6 (9/7), 7-6 (11/9)
Daniel Gimeno (ESP) bt Peter Gojowczyk (GER) 7-5, 6-3
Benjamin Becker (GER) bt Benot Paire (FRA) 3-6, 6-2, 6-2