Tuchel split his pre-season Chelsea squad into two and tasked his side with a heading game which saw each player in turn throw a ball to a team-mate to score with a header, before rushing in goal to stop the other team's identical effort. The winning team was the first team to score five goals.
The losing group - which included the likes of first-team stars Tammy Abraham and Davide Zappacosta - accused the other team of making up their total and asked Tuchel to check the amount of goals they scored using the cameramen filming the game.
Chelsea's training camp ensued into chaos after Thomas Tuchel's hilarious training game
Tuchel split his pre-season squad into two and tasked them with a heading game in Ireland
When Abraham and Co were confirmed as the losers, the Chelsea striker, who has been linked with a move away to Arsenal this summer, accused the opposition team of cheating and called the defeat a 'disgrace'.
The forward and his team-mates forced to sing either Backstreet Boys or the Spice Girls at the team dinner later that