Manchester City boss Manuel Pellegrini has taken a swipe at Chelsea over their crowding of the ref during this week's Champions League defeat to PSG.

Chelsea were fiercely criticised for urging ref Bjorn Kuipers to send off PSG star Zlatan Ibrahimovic on Wednesday, and Pellegrini warned there must be a limit to what teams will do to achieve victory.

"You will never see the City players surround the referee," said Pellegrini. "Maybe you can discuss with the referee about a decision but just one moment in the game. Every time the referee has a decision you have all the players on top of him and it's impossible for the referee to work.

"I think all the managers prepare their players to win, but there are different ways to win. You must analyse which is the correct way. They always try to pressure the referee in every decision, so the referee always has problems."