Monica Puig is one step closer to gold…

The 22-year-old Puerto Rican tennis player, competing in her first Olympics, routed French Open champion Garbine Muguruza 6-1, 6-1 on Tuesday to reach the 2016 Rio Games quarterfinals, notching the biggest win of her career.

“You just go in shock,” she said.

Even with the big lead, keeping it together through those last couple of games was tricky.

“You start getting emotional, and there’s no hiding it,” Puig said. “You start feeling those butterflies, those nerves. It’s all of that coming out.

Ranked 34th in the world, Puig has never reached the quarterfinals at a Grand Slam. Now she’s two wins from an Olympic medal.

She’ll face a player with a similar ranking for a spot in the semifinals: No. 32 Laura Siegemund, a 28-year-old German who is having a career year. Siegemund won her first WTA title at the Swedish Open last month.

At the 2013 French Open, Puig became the first woman representing Puerto Rico to reach the third round at a major in the Open era, which began in 1968. But at her first Olympics, her nationality takes on much more resonance.

“When I’m playing in the WTA, it’s more like I’m playing for myself — my job, let’s say,” she said. “Here, it’s not really my job. It’s for my country, and I think nothing in the world can compare to that. It’s the most special feeling when you put on your colors of your country and you’re walking around the Olympic Village and everybody looks to see your country on the back of your shirt.”

Muguruza is already a major champion. But after beating Serena Williams in the final at Roland Garros for her first Grand Slam title, the Spaniard lost in the second round at Wimbledon. She had 29 unforced errors to 15 winners on Tuesday.