Eighth seed Marcos Baghdatis is through to the second round of the Open Sud de France after beating Lukas Lacko in straight sets on Monday.
Cypriot Baghdatis, who was given a wildcard for the indoor hard court event in Montpellier, saw off the world number 44 7-5 7-5 in the first match of the night session.
Baghdatis took half of the eight break-point opportunities in his first-round encounter as he attempts to put the disappointment of falling at the first hurdle in the Australian Open behind him.
The 30-year-old recovered from going a break down at 3-1 in the first set and was far more assured on serve in the second to prevent another early exit.
Teenager Alexander Zverev was beaten by eventual Australian Open runner-up Andy Murray in Melbourne and responded with a defeat of Luca Vanni to make it through to the last 16.
It was by no means all plain sailing for the 18-year-old German, though, as he lost the first set but recovered to win 6-7 (3-7) 6-4 7-5.
Vanni earned eight break points, but won only one of them and paid the price as three breaks for Zverev were enough to progress.
Taro Daniel beat Denis Istomin 6-2 6-2 in the final match on the opening day of the tournament.