Manchester United striker Wayne Rooney has described his side's humiliating 3-0 loss to Liverpool as one of the darkest days in his playing career.

David Moyes' team performed below par and were swept aside by Brendan Rodger's team who were tactically stronger.

Steven Gerrard scored two penalties and Luis Suarez bagged the third as Liverpool comfortably defeated United in front of their home fans at Old Trafford.

"It's one of the worst days I've ever had in football," the United striker told MUTV.

"It's hard to take. You have to give Liverpool credit - they played well - but it's difficult to take. Nobody wants to lose, especially in this way, in your own stadium. It's not nice."

Rooney admitted they made it difficult for themselves conceding the first goal to Liverpool.

"To go behind by one penalty was hard to take," Rooney said. "We had a game plan for the second half, which went out the window when they got the second penalty so early on.

"It made it an uphill battle to come back. I thought after that we had a couple of chances where I thought if we got one we could have gone for a second and maybe we could have done it.

"Obviously it didn't happen, though.

"Then, to concede a third penalty, even though they missed, was a big blow to us. We were then chasing the game with 10 men. That made it difficult for us and they kept the ball well to see the game out."