Thiago, 29, has one year left on his Bayern contract but is expected to leave this summer.
In his postmatch news conference, Flick was asked by a reporter: "You had a long chat with Thiago after the ceremony. Was this maybe his last match for Bayern?"
The Bayern coach gave the deadpan reply: "No. He told me he'll stay."
Flick then left that answer to silently hang in the air for three seconds as the assembled media contemplated this shock bit of transfer news before, with expert comic timing, broke into a self-satisfied chuckle: "Hahahaha! You should have seen your face."
Flick went on to explain: "I just thanked him for our time together, just like I did with every other player.
"I don't know and he doesn't know yet either [where his future lies], because we all focused on this Champions League final.
"I think we will have to wait what the following days will bring."