Kei Nishikori is safely through to the second round of the Gerry Weber Open after beating Lucas Pouille in three sets.
The Japanese second seed had to battle back from a set down before securing a 6-7 (5-7), 6-1, 6-4 victory in one hour and 51 minutes.
Nishikori hit 24 winners while converting four of eight break points to turn the tables on Pouille, who had proved to be surprisingly resilient during the 49-minute opening set, which he won after managing to regain a lost break of serve.
Nishikori, who is making his fourth straight appearance in Halle, moves on to face the winner of the match between Brian Baker and Florian Mayer.
“I've been feeling like home here… This is very easy, convenient," he said. "I think it's a great tournament."
Fifth seed David Goffin was another winner on the day, though he needed nearly three hours to beat Borna Coric 7-6 (7-5), 6-7(3-7), 6-4 in a very close contest.
It wasn't until he broke serve at 5-4 in the third set that Goffin finally managed to get the upper hand.
Sixth seed David Ferrer was an early casualty, going down 6-3, 6-4 to Andreas Seppi in the final match of the evening.
Others to advance on Monday included Sergiy Stakhovsky and Benjamin Becker.