His argument with Lambert came after he argued with fourth official Martin Atkinson when Joe Bennett fouled Gareth Barry.

And the former Inter Milan coach thinks that other managers treat him differently but can not explain why.

"I am tired of this manager because I didn't say anything to him," Mancini said. "I asked the fourth official if it was a yellow card without moving my hands. Some managers go to bigger stadiums and they don't say anything. I am tired of this, very tired.

"I am tired of their behaviour and it's better that some managers shut up because I didn't speak with this manager. I asked the fourth official if it was a yellow card and I thought the referee had left his yellow cards in the dressing room.

"Every time that I say something they complain. I didn't say anything but when they go for example to Old Trafford they never say anything.

"I don't know why. I am Italian but I don't know the reason. I didn't say anything to him, only with the fourth official."

Mancini's team have only won twice in their seven matches, which has seen them concede 14 goals.

The Premier League champions have also failed to win any of their last four matches and Mancini knows where his team's problems lie.

"We need to work with our defenders because they don't work well at this moment," he added. "There are four competitions to go for, but this is the only competition we didn't win and because of this we wanted to stay in. We are missing this cup and we are disappointed with this.

"We're not playing well and our play is not quick. We want to have one more touch every time and it's no good."

Mancini also confirmed that City's England midfielder Jack Rodwell, who had been due to start the match, had sustained a groin injury in the warm-up.

City took the lead with Mario Balotelli's first goal of the season but saw Gareth Barry's own-goal pull Villa level.

When Aleksander Kolarov fired in a free kick, Villa replied again with Gabriel Agbonlahor's strike earning extra-time.

Six minutes into the extra period Charles N'Zogbia scored Villa's third goal before Agbhonlahor added the fourth.

Villa manager Lambert has only seen his side win once in the Premier League since he took charge in the summer.

But the former Norwich boss feels they are making significant improvements despite losing 4-1 at Southampton at the weekend.

"It's a massive result for us and we were excellent right from the off," he said.

"For 45 minutes we played well on Saturday [against Southampton] and you get games where you can't put your finger on what went wrong.

"It was a huge effort from us here and we didn't deserve to go a goal behind.

"We showed character to come back twice and go on and win the game and we're delighted with the performance."

Leeds, meanwhile, caused the biggest upset of the night as the Championship club defeated Everton 2-1 at Elland Road.

Toffees boss Moyes made six changes to the side who beat Swansea 3-0, but his reserves weren't up to the task.

Aidan White rocked Everton in the fourth minute as the Republic of Ireland Under-21 international weaved his way past several challenges before curling a shot past Jan Mucha.

Everton wasted several chances to equalise before Rodolph Austin poked home Danny Pugh's pass in the 70th minute and Sylvain Distin's 81st-minute goal was too late to spark a comeback.

"The atmosphere and the rain made it a real old fashioned cup tie," Leeds boss Neil Warnock said. "We deserved it and we should have scored two or three other goals."