Bouchard and Brinkley-Cook were spotted getting cozy and sipping drinks near the ocean and on the sand, where they talked and laughed on a beach chair.
The Canadian-born athlete, who rocked a blue-checkered bikini, had her hand on Brinkley-Cook’s shoulder in a number of photos that showed the pair looking flirty mid-conversation.
Neither Bouchard nor Brinkley-Cook, 27, has confirmed their relationship to be romantic. Both the tennis star and the actor are believed to be single.
In March, reports surfaced that Bouchard and Steelers quarterback Mason Rudolph had split after less than two years of dating. That month, Bouchard was seen at Ultra music festival in Miami appearing cozy with former Mets pitcher Matt Harvey.
Brinkley-Cook, meanwhile, and supermodel Nina Agdal split last November after four years of dating, PageSix confirmed at the time.
Bouchard celebrated her return to the court in March for the SoCal Honda Dealers Helpful Cup in California, after missing a year due to shoulder surgery.
Last week, Bouchard shared a video to Instagram, showing her serve progress.
“Hitting serves into a wall -> progress,” she wrote.
Bouchard was ranked No. 5 in the world in 2014, the same year she reached the final of Wimbledon and the semifinals of the French Open and Australian Open.
