French Open: Lindsey Vonn and boyfriend P.K. Subban make out in the front row

Packing on the PDA courtside!

While Serena Williams and Novak Djokovic played their second round matches at the French Open on Thursday, Lindsey Vonn and boyfriend P.K. Subban couldn't help but make their love known from the front row.

In photos from their tennis outing that emerged online, the Olympic skiier and the Nashville Predators player can be seen making out, taking photos and having a lovely time. At one point, when Djokovic was signing autographs following his win, he saw the couple in the stands and shook Subban's hand.

For their day at Roland Garros, Vonn opted for a tea-length white-and-grey snakeskin dress with a high collar, while Subban donned blue linen pants and an untucked white dress shirt.

Vonn and Subban clearly love watching tennis: It was their third straight day at the grand slam tournament, having been photographed at the event in Paris both of the previous two days. Back in September, they were also photographed in the stands at Arthur Ashe Stadium during the US Open in New York City.

Their appearance at the French Open comes almost exactly a year after they made their public debut as a couple on the red carpet at the 2018 CMT Awards. They started dating in April 2018.

Earlier this month, Vonn gushed about Subban in an Instagram post for his birthday.

"Happy 30th birthday to the love of my life!!!" she wrote. "Your energy and light has changed my world in so many ways and I can’t express how thankful I am to have you. Here’s to 30 and many, many more together, you old man!"