Arsenal No2 Pat Rice steamed into the players after their derby defeat at Tottenham. Rice accused them of letting the club down as they slumped to 15th in the Premier League with a 2-1 defeat at White Hart Lane.
Arsene Wenger's No2 usually leaves all the talking to his boss but he could not control himself after witnessing another dismal performance from the dugout.
An Arsenal source told the Daily Express: "Pat went crazy in the dressing room. He left the players in no doubt they have to improve - and quickly. He told them to look at themselves in the mirror.
"It is quite out of character for Pat to be so outspoken with the players, but it shows how passionate he is about the club."