Manchester City powerhouse Nigel de Jong believes Sunderland's 3-0 Premier League victory at Chelsea last weekend was an indicator that no side will storm away with the title this term.
The Black Cats shocked the reigning champions and league leaders with a crushing blow at Stamford Bridge on Sunday to hand the likes of Arsenal, Manchester United and the Citizens a timely boost.
Although de Jong's side were held to a goalless draw at home to Birmingham City on the Saturday, the Netherlands international insists it was still vitally important to collect a point from the contest.
"Sunderland showed that if you have belief, anything is possible and I think this will be a strange season where anyone can beat anyone," he said.
"The gap between the teams at the top and the chasing pack is closing and that means there are going to be some odd results.
"Everyone knows how difficult Chelsea are to beat, but they've lost two of their last three games and were beaten heavily at home last weekend – a result nobody could have predicted.
"Against Birmingham we were expected to win the game – and should have done because we had enough chances – but we didn't play as well as we can and they came to stifle our play.
"The important thing is, despite not being at our best, we still picked up something from the game – what was disappointing from our point of view is that a lot teams around us also dropped points and we didn't take advantage of it."