Argentina’s Renzo Olivo stunned the Roland-Garros faithful today as he advanced to the second round of the French Open in Paris, defeating 12th-seeded home hopeful Jo-Wilfried Tsonga 7-5 6-4 6-7(6) 6-4.

Olivo – ranked a modest 91st in the world – won in four sets on Wednesday after the match was interrupted on Tuesday night due to fading light. The Rosarino had been 5-4 up on Tuesday night and was poised to win before failing to serve out the match.

The pair were forced to wait for Venus Williams to finish her match before taking to the Phillipe Cartier court to play out the remaining game, and it wasn’t long before the little known Olivo confirmed the biggest victory of his career so far.

Olivo’s appearance at The French Open is only his third at a Grand Slam and his first at the fabled Parisian venue, where recent Lyon Open champion Tsonga had hoped to become the first Frenchman to win the title in 34 years.

“I didn’t sleep well,” Olivo admitted afterward. “And I finished everything at around 1:00 in the morning. So it was really late. And then after, with the adrenaline of the match, I couldn’t sleep much. So it was tough.”

He will face Britain’s Kyle Edmund on Thursday, while fellow Argentine Juan Martin del Potro plays Spain’s Nicolas Almagro in his first-round tie.