Sunderland boss Martin O'Neill admitted there was an element of controversy surrounding his side's winning goal in the 1-0 victory over Manchester City.
Substitute Ji Dong-Won made the most of a counter-attack as too many men in blue stood and watched, but there was a suspicion of offside about the goal.
O'Neill said: "They tell me it was marginally offside - marginally, marginally - and we ended up winning the game.
"It's been an incredible weekend for teams and we are delighted with three points."
Asked if he was delighted, he added: "What do you think? Absolutely, yes. It was just a remarkable performance by the team.
"The roar for the goal was deafening, and I was delighted to hear the roar for the final whistle as well. It was a fantastic effort, really, really fantastic."