Chelsea only have themselves to blame. It was in their hands, win the rest of your games, you are champions. But they've blown it. That defeat will cost them title, they'll probably be less than 3 points between them and liverpool by the time the last game has finished.
Against sunderland they were lacklustre. They went 1-0 and drifted along. Loss of concentration, sunderland are level. For the next 60 mins, they continued to drift along, creating few chances, no cutting edge.
I really don't think chelsea can be grumbling about decisions, their performance wasn't worthy of a team going for a title who have it in their hands. They should have been battering sunderlands defence and creating havoc in their defence until they went ahead again.
We all know if liverpool had played that game they'd have probably been 2-0 inside the first 15 mins.