Cameron Norrie booked his place in the second round of the Monte-Carlo Masters with a straight-sets win over Adrian Mannarino, but Marin Cilic was dumped out.
World No 56 Norrie required only one hour and 19 minutes to secure a 6-4, 6-3 win over the Frenchman.
The Brit broke in game three in both sets and then served it out to set up a clash against Hungarian Marton Fucsovics, who beat 12th seed Nikoloz Basilashvili.
Felix Auger-Aliassime booked a date with Alexander Zverev as the Canadian produced a workmanlike 7-5, 7-6 (7-5) win over Juan Ignacio Londero.
Auger-Aliassime took a 4-1 lead after breaking in game four of the opening set, but the Argentine drew level after breaking back in game nine only for the teenager to claim another break in game 12.
After trading breaks midway through the second set, it eventually went to the tie-breaker and Auger-Aliassime edged it again.
Pierre-Hugues Herbert, meanwhile, scored a 6-4, 6-4 win over Fernando Verdasco while Taylor Fritz advanced when Jo-Wilfried Tsonga retired while 6-2, 2-0 down.
Seventh seed Marin Cilic became the biggest casualty of the day as he went down in three sets to Guido Pella as the Argentine won 6-3, 5-7, 6-1 in two hours and 15 minutes.
Go Guido Go!
— Tennis TV (@TennisTV) April 16, 2019
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