Liverpool manager Kenny Dalglish did not want to be drawn on suggestions Rio Ferdinand could have been sent off in Manchester United's victory at Old Trafford.
The Scot saw his team lose 2-1 on Saturday lunchtime in a match overshadowed by Luis Suarez's refusal to shake hands with Patrice Evra in the compulsory pre-match routine.
Suarez was also at the centre of a contentious issue immediately before half-time, when the score was still 0-0, and he went down under a challenge from Ferdinand.
The Liverpool striker was furious not to be awarded a foul and a possible red card for United centre-back Ferdinand, who was the last man, but replays proved inconclusive.
And Dalglish told Sky Sports HD2: "If you have 24 cameras here and 34 repeats and cannot see what happened, then there is no chance of me having an opinion."
Wayne Rooney scored two goals in three second-half minutes shortly after the interval to mean Suarez's later strike was only a consolation.
"The two goals coming as quickly as they did made it a really difficult opportunity for us to get anything from the game," said Dalglish.
"Give the boys credit, they got back and got a goal. Luis knocked one over the line from a free-kick."