Former Liverpool manager Gerard Houllier has slammed Luis Suarez as "stupid".
Houllier was stunned at the striker's decision to not shake Manchester United captain Patrice Evra's hand.
And he also criticised him for kicking the ball towards the United bench.
"The start was affected by the tension created by the handshake incident.
"And he had a stupid reaction before the break. The whole United team was furious."
Houllier spoke to Alex Ferguson after the match and added: "Evra showed a lot of dignity by offering to shake Suarez's hand but what he did at the end was avoidable." Houllier said: "He behaved in a stupid way because we knew there would be tension surrounding this match.