SYDNEY'S disappointing loss to Geelong on Thursday night has been compounded by injuries to experienced trio Jarrad McVeigh, Kieren Jack and Dan Hannebery.

Jack damaged the medial ligament in his left knee midway through the first term against the Cats and didn't return for the rest of the match, while McVeigh broke his collarbone late in the game after landing heavily on his right shoulder.

A COSTLY LOSS FOR SWANS Full match coverage and stats

Hannebery suffered a calf strain in the opening quarter, and while he played out the match, coach John Longmire was forced to use him forward, and he had little impact.

The loss of the three Swans came after Longmire revealed pre-match that young defender Lewis Melican re-injured his hamstring at training during the week.

SWANS FALL AT SCG AGAIN Five talking points

"We lost a few tonight, 'Hanners' hurt himself early and when we lost Kieren as well, we were a bit short on runners through the midfield," Longmire said after the loss.

"I don't know if 'Hanners' tore it but he was affected by it, with Kieren we're not sure what grade medial it is, and 'Macca' has an operation."

During the match, Jack told Channel Seven he would get scans on his knee on Friday morning.

"I did [a medial ligament] a few years ago, felt pretty similar, I just felt a click in it," Jack said.

"I think it's on the minor side. We did some tests on it and it's classic medial symptoms, so without taking the risk, we pulled the pin.

"I'll get a scan first thing in the morning just to check on it and we'll go from there, the docs and physios will let me know. I'll probably miss a little bit of footy, I would have thought."

The Swans' scoring troubles continued against Geelong, and they were lucky the Cats left their kicking boots at GMHBA Stadium.

The visitors dominated the midfield battle before half-time, leading the clearances (24-15) and centre clearances (7-1), with Patrick Dangerfield, Tim Kelly, Joel Selwood and Mitch Duncan on top, and Sydney skipper Josh Kennedy limited by the attention of Scott Selwood.

It meant that superstar Swan Lance Franklin and gun onballer Luke Parker – who was thrown forward to add some potency with the likes of Sam Reid, Tom Papley and Gary Rohan all absent – were starved of opportunities.

The Swans managed only 46 inside 50s against Geelong after they could only register 43 in last week's loss to Richmond, and Longmire said his team is lacking efficiency going forward, and his goalkickers aren't being given enough supply.

WATCH John Longmire's full post-match media conference

"It's both, we're not getting enough footy inside 50 and there's a couple of different reasons for that," he said.

"When you're getting beaten out of the centre like we were in the first half you're not getting it into your front half.

"We're not getting a lot of repeats either, which can be on the back of clearances.

"We changed things up a bit at half time both with personnel and structure to try and get some momentum our way, which we did in the third (quarter).

"But if you look at the scoring shots that were the same (for the quarter)."

Sydney could be boosted by the return of Isaac Heeney (concussion), Papley (hip) and Rohan (hamstring) for next Sunday's clash with North Melbourne.

Reid will play in the NEAFL on Saturday, and if he can get through a second straight match, he might also be considered for his first senior game since round three.