When Rooney and Slot arrived at Ushuaia, the famous Ibiza venue, little did they know that the night would lead to the two footballing figures sharing more than just a space to enjoy music.
Speaking on The Wayne Rooney Show, the former striker revealed: "We went to watch Calvin Harris and they put us in a VIP area and Arne Slot was standing in front of me. So we had a good chat."
Rooney, who has spent most of his career battling Liverpool on the pitch with both United and Everton, admits that while it’s hard to swallow Liverpool’s recent successes, he still respects the achievement.
"I said congratulations on winning the league," he added. "I think as much as I don't want Liverpool to win the league, I think you've still got to be graceful as well. So I said congratulations, and then we watched Calvin Harris, and we had a few drinks."