Newcastle United manager Alan Pardew has apologised for venting his anger at Manchester City counterpart Manuel Pellegrini after his side were controversially denied an equaliser at St James' Park on Sunday.
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Cheick Tiote saw a powerful shot beat goalkeeper Joe Hart in the first half on Tyneside but the goal was ruled out for offside, as it was seemingly deemed that Yoan Gouffran was interfering with play.
Pardew reacted angrily to the call, and at half-time confronted both the referee and Pellegrini, appearing to verbally abuse the Chilean.
"I apologise for that," Pardew told Sky Sports after Newcastle's 2-0 loss. "But he had words with me first and it was just normal for managers that go unseen most of the time. We're fine, I shook his hand at the end and I'll see him before I go."
Pardew tracked down referee Mike Jones after the match to discuss the disallowed goal and revealed he was not satisfied with the answers he received.
"For me, this is an entertainment business. The guy's hit a goal that Joe Hart is just not going to save. It goes through a number of bodies but his vision is not impaired," he said."I don't think he was clear in his answers about Joe Hart being impaired -- I couldn't work that out.
"I don't understand it. Even if Man City's back four is on the edge of the box and we've got four offside, it's such a clean hit, it's going in the top corner. He's got that wrong and unfortunately that was a massive call. In these type of games that have got to go your way. It was probably easier for him to give the goal and I can't understand why he hasn't.
"We're crying out for entertainment, you hit a goal like that the place is in uproar, and he's gone on a real tiny technicality, which I think is wrong."
Newcastle midfielder Tiote, meanwhile, revealed he could not understand referee Jones' decision to rule out his strike.
"I don't understand why the referee didn't give the goal," Tiote told Sky Sports. "I think it was Gouffran who was next to the goalie but he didn't touch it. I don't know why the assistant referee decided to give offside.
"That's football, we need to accept it and go forward. I'm so disappointed today but I think we played well and that's the most important thing. We can take it on to the next game."
Information from the Press Association was used in this report.