Top Italian Matteo Berrettini opened his fourth Roland-Garros campaign on a winning not on Tuesday with a 6-0, 6-4, 4-6, 6-4 victory over Japan's Taro Daniel.
The ninth seed clocked 14 aces and won 90 per cent of his first-serve points to deny the 113th-ranked qualifier after two hours and 22 minutes.
The 25-year-old Roman was aware of the danger Daniel posed after the Japanese player pushed him to three sets in the semi-finals of his Belgrade title run leading in.