Peterborough came back from a goal down to beat Crystal Palace.
The home side went behind when the ball broke to Sean Scannell in the Posh area and he cleverly flicked the ball over keeper Paul Jones for the opener.
Peterborough increased the pressure for an equaliser after the break and were rewarded when Grant McCann drilled in a first-time shot low into the corner.
David Ball came off the bench to grab the winner when he nodded in a Mark Little cross.
Palace narrowly escaped relegation last season and their capitulation will prove a worry for manager Dougie Freedman.
The Eagles started promisingly enough and almost scored straight from the kick-off when a shot from winger Scannell was forced around the post by keeper Jones.
McCann responded for Peterborough and his long range shot was tipped over the bar by Julian Speroni before Scannell gave Palace the lead.
Defender Peter Ramage kept the visitors ahead when he blocked a fierce drive from Ball on the goal-line but Palace failed to keep their hosts at bay for much longer.
Lee Tomlin played a free-kick into the path of McCann and he powered in a shot before Ball added a second for Posh to secure victory.