Luckless Sinclair hurt again
Ben Sinclair's hamstring injury marred Collingwood's JLT Community Series victory against Essendon at Etihad Stadium.
Concussion issues restricted Sinclair to 13 games last season, and his bad luck continued when he suffered an injury in the third quarter of the first pre-season game.
It's unfortunate for him but we take it on the chin, get it right and then move on.Nathan Buckley
He was helped from the field and will need to be assessed to find out how long he will spend on the sidelines.
Coach Nathan Buckley said Sinclair was "pretty sore".
Buckley added: "He's put a lot of work in but we'll see what the extent of the injury is and then we'll get on with it. It's unfortunate for him but we take it on the chin, get it right and then move on."
The 25-year-old has been in the AFL since 2010 but has only managed 63 games. Hamstring problems kept him out for most of 2014 and 2015, when he managed only 11 matches overall.
Buckley has, though, downplayed concerns star recruit Daniel Wells suffered a setback in a VFL game on Wednesday.
The former North Melbourne man suffered a calf knock but Buckley said he would continue to train.
Buckley said he was pleased with the way his team started the pre-season competition, particularly forward Jamie Elliott.
A serious back injury kept Elliott out for the whole of last year but the Magpies are hoping the player, who kicked 30 or more goals in the previous three seasons, will be back to his best in 2017.
"He's got great intensity, he's a busy player when he plays footy. He tips into the defensive elements which we love, and he really hurts with his possessions," said Buckley, who took Elliott off at half-time.
"He would have been capable of playing a lot longer tonight but he hasn't missed a beat since coming back at the beginning of pre-season."
Collingwood are 40/1 to win the Grand Final.
The Magpies are 4/1 to finish in the top eight.
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