VIDEO: Pep Guardiola and Nigel De Jong go at it in the tunnel at half-time

Bayern Munich manager Pep Guardiola and AC Milan midfielder Nigel De Jong had a heated discussion during the teams' opening game of the 2015 Audi Cup at the Allianz Arena.

The two spat heated words at one another and gestured wildly, with Guardiola angry at De Jong over a rough tackle on Joshua Kimmich in the first half of the game.

Guardiola is having a bit of a strange day, having already been seen spacing out, with mouth wide open and eyes glazed over while Real Madrid manager Rafa Benitez was speaking in a pre-tournament press conference.

But Guardiola looked wide awake and in the moment in the tunnel at halftime, making his opinion known when he saw the Dutch midfielder in the tunnel, who, in turn, gestured with a "come at me" look in his eyes.

The two didn't come to blows, which is probably a good thing, since De Jong is a kung-fu master.

(Courtesy: mrFOOTBALL)