British number two Cameron Norrie reached the second round of the Monte Carlo Masters by beating France's Adrian Mannarino 6-4 6-3.
The 23-year-old broke early in both sets to win in one hour 19 minutes.
World number 56 Norrie next faces Hungary's Marton Fucsovics, who beat 12th seed Nikoloz Basilashvili.
Eleven-time champion Rafael Nadal, who had a first-round bye, begins his title defence against fellow Spaniard Roberto Bautista Agut on Wednesday.