Genie Bouchard is single for the summer ... TMZ Sports has learned the tennis star and her longtime boyfriend, Jack Brinkley-Cook, have broken up.
Our sources say the two officially headed to Splitsville in April ... calling off a relationship that had lasted somewhere around two years.
The couple was first spotted together getting cozy on a beach in 2022 -- just after her breakup with NFL quarterback Mason Rudolph -- and in September 2023, they went Instagram official.