Celtic goalkeeper Artur Boruc has accused Ryan Giggs of diving following their 3-2 UEFA Champions League defeat at Manchester United.
The Scottish champions ended up on the wrong end of a pulsating result at Old Trafford on Wednesday evening, as United came away with an opening win in Group F.
The Poland number one believes Red Devils winger Giggs fooled Slovakian referee Lubos Michel into awarding United a first-half penalty when he went down after colliding with Boruc on the edge of Celtic's box.
The 26-year-old was less than impressed with the Wales international's actions, feeling the decision against The Bhoys was harsh.
"For me it was never a penalty, so I was angry," Boruc said. "I tried not to touch him, and he just dived. It looked like he dived.
"I am upset, and so are my team-mates. We played well, but it was not enough.
"It was really a big thing in the match. We were playing well and we had scored a goal at that time.
"After the penalty, we were afraid about what was going to happen."
Celtic captain Neil Lennon claims Michel was waiting to hand United a favourable decision.
"From what I have heard, it was very debatable," Lennon said. "From where I was, the contact was minimal.
"But Mr Michel is a good old friend of ours, so we didn't expect many favours off him.
"We met him in Barcelona as well, so we weren't holding out for anything off him.
"From our point of view, he couldn't wait to give it. I went and had a word and said to give it you have to be 100 percent sure - but he said 'I am'.
"It is inconclusive from the TV."