Manuel Pellegrini says he simply didn't want to shake hands with Jose Mourinho after Manchester City's 2-1 defeat against Chelsea on Sunday.
There is no love lost between the pair after Mourinho said Pellegrini's achievement of guiding Real Madrid to 2nd place in La Liga behind Barcelona with a record points haul in 2010 only made him 'first loser' after being named as his successor.
Mourinho appeared to antagonise his Manchester City counterpart with his celebrations after Chelsea's last-minute winner at Stamford Bridge - the 'Special One' launched himself into the home crowd after Fernando Torres took advantage of a defensive error to slot home.
Mourinho explained afterwards that he was trying to get to his son who was in the crowd behind the Chelsea dugout, but had his path blocked by supporters.
"If they feel I did something wrong, I apologise," the Portuguese boss said after the game.
When quizzed afterwards as to why he went straight down the tunnel without shaking Mourinho's hand, the Manchester City boss simply replied: "I didn't shake hands. I didn't want to."
He added of Mourinho's celebration: "I did not expect anything different from him. It is normal."
A disastrous mix-up between Joe Hart and Matija Nastasić gifted Chelsea three points yesterday, which moves them up back up to second.
Manchester City meanwhile slip down to 7th following the defeat, two points ahead of rivals Manchester United.