Swansea boss Alan Curtis was left fuming with referee Graham Scott following the 4-2 home defeat against Sunderland on Wednesday night.

The Swans boss argued that two of Jermain Defoe's goals were offside, and defender Kyle Naughton was harshly sent off after he won the ball in his tackle on Yann M'Vila.

Curtis pointed out that the match official's call to award the first-half penalty to the Swans, which was converted by Gylfi Sigurdsson, was also wrong.

"There was a penalty decision given to us which, looking at it again, I don't think it was a penalty and I think that summed up the referee's game," said an aggrieved Curtis.

"All the major incidents in the game I thought he got totally wrong."

"I thought the first and the third goals, the third especially, [were offside]."

"Again, when you look back, they are clearly offside but I think the biggest one for us was the sending off.

"We were a bit fortunate with the penalty decision, but when you go down to 10 men - I think we played probably close to an hour with 10 men - that's the one that really sort of killed us and affected us more than anything.

"I thought at the time it was a really harsh decision and when you look at it again, he clearly wins the ball and it's another major decision that the referee got wrong."