The Swiss, who beat Andy Murray in the first round, was broken three times in the final set by the French wildcard, who was cheered to victory by the home support inside Suzanne Lenglen. Gaston had not won an ATP Tour match before this year’s Roland Garros. “It’s fantastic. It was a great match,” the 20-year-old said. “I’m very happy today. Before I was always watching this on TV. Today I can play on these courts, so it’s amazing for me.” Gaston, the lowest-ranked man to reach the fourth round at Roland Garros for 18 years, will now play US Open winner and third seed Dominic Thiem who booked his spot in the fourth round with a hard-fought 6-4 6-3 6-1 victory over Norwegian Casper Ruud.