Middlesbrough boss Gareth Southgate has labelled Cristiano Ronaldo a serial diver after his display in Manchester United's 2-1 win at The Riverside.
Television replays showed there was no contact between Boro keeper Mark Schwarzer and Ronaldo when the winger won United a 19th-minute penalty.
"Ronaldo has a history of it," Southgate told the News of the World.
"Our keeper has done everything to get out of the way, but the lad has gone down once again."
Asked if he felt cheated by Ronaldo, Southgate said: " Yes - it's as simple as that. I cannot see it was a penalty for love nor money.
"He did it again afterwards with a free-kick against George Boateng."
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After watching television replays, Manchester United boss Sir Alex Ferguson said the penalty was justified.
"Schwarzer is trying to avoid it, but would Ronaldo have scored? I think he would, but anyway it was a penalty kick."
It is not the first time Ronaldo's sportmanship has been questioned.
Liverpool captain Steven Gerrard labelled the winger "a disgrace" for his part in Wayne Rooney's sending-off at the World Cup.
Gerrard was furious when Ronaldo got involved after Rooney appeared to stamp on Portugal defender Ricardo Carvalho.
"Sadly a dark side stains Cristiano Ronaldo's game," wrote Gerrard in his autobiography.