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Dallas Mavericks star Cooper Flagg’s season ended last month, but that didn’t stop him from making big plays.
Flagg confirmed his relationship with Duke women’s basketball center Arianna Roberson on Thursday with a post on his Instagram Story. Flagg posted a photo of them kissing while in Turks and Caicos, and Roberson reposted it on his Instagram Story with two black heart emojis.
Roberson also posted a TikTok of the couple together throughout their vacation, with the caption “keep it going.”
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(Left) Dallas Mavericks forward Cooper Flagg (32) watches from the team’s bench during the second quarter against the Orlando Magic at the American Airlines Center in Dallas, Texas on April 3, 2026. (Right) Duke Blue Devils center Arianna Roberson participates in drills during practice ahead of the 2026 Sacramento Regional 2 women’s NCAA tournament at the Golden 1 Center in Sacramento, California on March 26, 2026. (Jérôme Miron/Imagn Images; Ed Szczepanski/Imagn Images)
Rumors started about their relationship when they posted photos of themselves on their own accounts at the same resort at the same time, leading fans to believe they were vacationing together. They were also seen together at Cameron Indoor Stadium in February, attending Duke’s 101-64 blowout win over Syracuse.
The couple overlapped for a year at Duke in 2024-25, when they were both freshmen. Flagg declared for the NBA draft after leading Duke to the Final Four and was ultimately selected with the No. 1 pick in the NBA draft.
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Duke Blue Devils center Arianna Roberson participates in drills during practice before the Sacramento Regional 2 of the 2026 NCAA women’s tournament at the Golden 1 Center in Sacramento, California on March 26, 2026. (Ed Szczepanski/Imagn Images)
While the Mavericks struggled and missed the playoffs in Flagg’s rookie year, he enjoyed a lot of personal success. He edged out former Duke teammate Kon Knueppel, a Charlotte Hornets forward, to win NBA rookie of the year honors.
In 70 games, Flagg averaged 21 points, 6.7 rebounds, 4.5 assists and 1.2 steals per game.
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Dallas Mavericks forward Cooper Flagg dribbles during the second half of an NBA game against the Los Angeles Lakers in Dallas on April 5, 2026. (LM Otero/AP)
Roberson, in 33 games, averaged 8 points per game on 41.6% shooting with Duke. His older brother, Andre Roberson, played seven seasons in the NBA, spending the majority of his career with the Oklahoma City Thunder.
