Fremantle ruck duo Sean Darcy and Rory Lobb will await scan results following separate injuries from Thursday night's 69-point loss to Geelong.

The Cats handled the Dockers with ease at Optus Stadium to sit atop the summit of the ladder for the time-being, with Fremantle's finals credentials now heavily questioned.

Their bid for a top-eight finish received collateral in the loss, with the in-form Darcy having his night ended following a dominant display in the middle of the ground.

The 23-year-old managed 18 disposals, eight clearances and 37 hit-outs before succumbing to a knee injury late into the match.

Embed from Getty Images

Lobb was subbed out of the game at half-time with a reported syndesmosis injury, with youngster Brandon Walker coming into the game.

The pair of injuries place further headaches to coach Justin Longmuir, who is currently without key-forward Matt Taberner through injury.

Speaking post-game, Longmuir said the club will await the results of scans for Darcy and Lobb in the next 24 hours.

"We've got a 10-day break and weโ€™ll get them scanned tomorrow. Iโ€™m not going to rule them out for next week," he said.

The Dockers could be hit with further damages as tall forward and part-time ruckman Josh Treacy was placed on report during the loss.

The 18-year-old found himself in the umpire's book after a late hit on Cats defender Jed Bews during a marking contest.

It is expected that Treacy won't be sidelined through suspension, with a fine the likely outcome of the incident.

The Dockers face fellow finals contenders Sydney in Round 19, with that match scheduled for GMHBA Stadium.