GEELONG youngster Nakia Cockatoo and tagger Scott Selwood look set for a stint on the sidelines after suffering hamstring injuries in the loss to West Coast.

Cockatoo, who kicked the first goal of the game, came off the ground in the opening quarter to receive treatment on his right hamstring – for the second time in a month.

The 20-year-old returned briefly a few minutes later, but was ruled out of the match after the injury hindered his ability to perform at full speed. 

Cockatoo injured the same hamstring in the first quarter against the Western Bulldogs in round nine and missed just one match.

Selwood, meanwhile, left the field late in the third quarter to have his right hamstring worked on and he, too, did not see out the game. 

"We're pretty confident they're minor (injuries), but it's hard to get a gauge on it," Cats coach Chris Scott said post-match. 

"When they're bad enough for them not to play on, obviously there's some significance there. 

"They're certainly not bad hamstrings that we're worried about losing guys for a long period of time." 

Western Bulldogs midfielder Lin Jong suffered a suspected anterior cruciate ligament tear halfway through the first term against Melbourne. 

The 24-year-old kicked the ball on the wing when Demons co-captain Nathan Jones ran across to smother his effort and collided into his right knee.

Jong, who entered the game with his other knee heavily strapped, came off the ground in the hands of the medicos and sat out the contest. 

Melbourne has a number of injury worries ahead of the long trip to Perth to face West Coast, headlined by co-captain Jones and forward Jack Watts. 

Jones took no part in the final quarter against the Bulldogs with a right quad strain, while Watts experienced right hamstring tightness and, like Jones, sat out the last term with ice strapped around the injury. 

"Clearly with six-day breaks, we just decided to rest them for the last quarter and not put them out there," Demons coach Simon Goodwin said post-match. 

"We'll assess them during the week (but) if there's any risk, we certainly won't be playing them (against West Coast)." 

Demons defender Jayden Hunt hurt his left shoulder in a hard landing from a marking contest with Bulldog Caleb Daniel in the third term, and defender Neville Jetta picked up an ankle concern in the same quarter.

Hunt and Jetta went to the rooms at three-quarter time for treatment and returned in the last term.

Meanwhile, Melbourne will be boosted by the return of ruckman Max Gawn for Saturday night's clash with the Eagles after overcoming right hamstring surgery.

West Coast has its own concerns, with young defender Jackson Nelson straining his hamstring and not featuring in the second half against Geelong. 

Port Adelaide midfielder Jared Polec will miss around three weeks to nurse the right hamstring he damaged in the closing minutes against the Brisbane Lions. 

The 24-year-old reached for his leg after he took possession of the ball, sidestepped his opponent and began a short burst through the middle of the ground. 

"It looks like a pretty natural hamstring injury and we would suspect that if it is, he would miss two to three weeks," Power coach Ken Hinkley said post-match. 

Gold Coast midfielder Michael Barlow will miss the rest of the season after having surgery on Sunday to repair the left fibula he fractured in the last quarter against Carlton.

The 29-year-old gathered possession on the wing and was met by Blues midfielder Bryce Gibbs, who wrapped up the Sun in a tackle and fell across his lower leg.

Play was halted for just under five minutes as the club's medicos and trainers assisted him from the field on a motorised stretcher. 

A composed Barlow sat up on the stretcher as he left the ground inhaling pain relief medication.

Barlow broke the tibia and fibula bones in the same leg almost seven years ago in his debut season with Fremantle – 2010 – in a freak collision with his then teammate Rhys Palmer.

In other injury concerns in round 13: 

- West Coast midfielder Matt Priddis had his left thigh strapped at half-time but played out the match. After the game, Eagles coach Adam Simpson could not confirm why Priddis needed medical attention. 

- North Melbourne forward Jarrad Waite was slow to get to his feet after his head hit the ground in a last-minute tackle from St Kilda defender Nathan Brown. 

- Richmond defender Dylan Grimes hurt his ankle in the last quarter against Sydney and emerged from the rooms with it re-strapped. "He came back on the ground so I assume he'll be fine," Tigers coach Damien Hardwick said post-match.

- Greater Western Sydney midfielders Josh Kelly and Jacob Hopper were injured during the club's training session on Saturday. A Giants spokesman told AFL.com.au the duo would be further assessed this week. Hopper was due to return shortly after the bye after having surgery to repair a broken finger he suffered against St Kilda in round seven. 

- Brisbane Lions youngsters Jake Barrett and Nick Robertson left the ground late against Port Adelaide, but coach Chris Fagan could not shed any light on the pair after the game. Meanwhile, Lions vice-captain Tom Rockliff spent extended periods on the bench in the second half. It is unclear whether that was due to a groin problem. 

- Richmond defender Kamdyn McIntosh (hamstring tightness) and ruckman Toby Nankervis (corked calf) will be closely monitored this week after they each picked up niggles against Sydney. 

- St Kilda midfielder Luke Dunstan received a knock to his shin against North Melbourne and will be examined over the course of the week.

- North Melbourne defender Robbie Tarrant was assessed by the team doctor at quarter-time for a lump on his right cheekbone after St Kilda forward Mav Weller ran into him in a contest. In a separate incident, Tarrant signalled to the bench for assistance with a left hamstring complaint in the second term. The 28-year-old shook off the scare and remained on the ground. 

- St Kilda midfielder Koby Stevens was hurt in a second-quarter marking contest after receiving a knee to his left shoulder from North skipper Jack Ziebell. Stevens appeared to experience a shortness of breath, but returned to the field shortly after having his arm strapped.

- Gold Coast defender Adam Saad crashed into Carlton midfielder Dale Thomas' back at full speed just before half-time. Thomas turned his body to protect himself, but could not avoid the heavy collision. Saad, who took some time to get back to his feet, came back in the third quarter.