Dino Prizmic is proving that his stunning victory over Novak Djokovic was no fluke. The 20-year-old Croatian followed up his headline-making win by powering past France's Ugo Humbert 6-1, 7-5 on Sunday to advance to the last 16 of the Italian Open in Rome.

Prizmic, who had to qualify for the main draw, is now looking every bit the contender on clay. His performance was a masterclass in power and precision, as he raced to a 5-0 lead in the first set and closed it out in just 28 minutes. Humbert, seeded 31st, was left shellshocked. Such was Prizmic's dominance that he even had the confidence to attempt a trick shot between his legs during game six—though he did lose the point.

Humbert fought back in the second set, but after dropping his serve for the third time in game 11, Prizmic sealed the match on his second match point. Next up for the rising star is 13th seed Karen Khachanov.

"I just want to play my game and to be myself on the court, and we will see," Prizmic told reporters after his impressive display on the Pietrangeli court. "Maybe for me the goal is to be top 30 at the end of the year, but I just want to stay healthy and to play as much as I can."

With this performance, Prizmic is set to climb 11 spots to world No. 68 when the rankings update on Monday—just before the French Open gets underway. It's his best ever showing in a Masters 1000 tournament.

Meanwhile, Alexander Zverev kept his quest for a third Italian Open title on track with a straightforward 6-1, 6-4 win over Alexander Blockx on center court. The second seed, who was heavily beaten by Jannik Sinner in the Madrid final last weekend, barely broke a sweat against Blockx. Zverev, a two-time champion in Rome (2017 and 2024), will face either Tommy Paul or Italy's Luciano Darderi in the fourth round.

Zverev, who shares the same side of the draw as Prizmic, had high praise for the young Croatian. "There's a lot of young guys who are playing great tennis. He's definitely one of them," Zverev said. "But I'm going to go match by match. I think that's the most important thing—not to look too far ahead and focus on the next one."

In the women's draw, Naomi Osaka is setting up a potential blockbuster clash with three-time Rome champion Iga Swiatek after easing past Diana Shnaider 6-1, 6-2. The former world No. 1 looked sharp as she booked her spot in the last 16, where Swiatek could be waiting.