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Brooks Koepka won his first major at the U.S. Open Sunday. but it's his super hot model girlfriend who's the REAL victor.

Golf's 2017 U.S. Open at Erin Hills in Wisconsin made for a lot of firsts.

Brooks Koepka's girlfriend may not want to watch the replay of her boyfriend's U.S. Open win.

The 27-year-old from West Palm Beach, Florida, won his first major with a final score of 16 under par, beating fellow American Brian Harman and Brit Tommy Fleetwood to the silverware. Buck accidentally referred to Sims as Koepka's former partner, Becky Edwards, USA Today reported. Problem was, Buck wasn't aware that Koepka had split with his previous girlfriend, Becky Edwards. But the woman celebrating with the new U.S. Open champ was actually Sims, an actress and former beauty pageant victor.

It was not long before critics took to social media, expressing their views and, while most found humor in the mistake, others were up-in-arms.

Koepka shared a brief embrace with Sims before they hopped into a golf cart and headed for the clubhouse ahead of the trophy ceremony.