The Sydney Swans have beaten defending premiers Collingwood by 33 points at the MCG, to spoil the party for the Magpies at the MCG.

The home side edged in front after a three goal to two opening quarter, but the Swans kicked 13 goals to seven after quarter-time, and never looked threatened in the second half as they won 15.12 (102) to 10.9 (69) in front of 78,933 fans on Friday night.