Rich, 39, made a rare public appearance to see the Phoenix Suns lose to the Milwaukee Bucks. The Cold Shoulder singer, 33, was seen laughing with Rich.
Brian Windhorst, an ESPN announcer, waggled about the couple's relationship status and declared on a late-night podcast that they were "an item".
"Rich Paul brings his girlfriend along to the game to be next to LeBron," Windhorst said. Windhorst stated that Adele is his girlfriend.
He said, "Rich Paul is at this game with Adele." They are the first to be seen together in public.
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Adele wore a bold black coat with bleached patches to highlight her weight loss.
When she went out to the sporting event, her long blonde hair fell past her shoulders. The Rolling In The Deep singer accessorized with chic pieces of jewelry.
Rich was seated next to Rich in an elegantly-clad jacket and a large facial covering. The mother, a loving friend, kept it on throughout the match. Rich occasionally took it off.
Adele, who was trying to get into the spirit of it all, was seen waving an orange towel in support for the Phoenix Suns at one point.
Other stars were also present at the event, and they were scattered around the courtside seating area.
Vanessa Hudgens gave a great performance singing The Star-Spangled Banner before the game started. LeBron James and Lil Wayne joined Adele in the crowd.
Adele seems to be a sports fan, as she made her last social media post supporting the England team during Euros.