Just when Jose Mourinho thought the coast was clear following Arsene Wenger's Arsenal exit, it appears he has previous feud with the Gunners new manager.
The Manchester United boss loved public mud-stinging matches with the Frenchman, famously calling him a 'specialist in failure' after a barren run without trophies.
But if you were expecting the touchline to be calmer in fixtures between the two sides starting from today’s league match then you should think again.
Back in 2010, Arsenal's new manager Unai Emery and Mourinho were locking horns in La Liga and had quite a rivalry.
After Real Madrid beat the Spaniard's Valencia 1-0, Mourinho famously waved a piece of paper with a list of mistakes he claimed the referee made during the game. Emery's response was cutting. "We at Valencia have good reason to make a public complaint against all the mistakes that have led to us losing, but we do not," he said.
"The position of Mourinho is that of a cry baby."
It is said that the Portuguese hasn't forgotten those comments - so don't rule out fireworks on the sidelines on Wednesday.