Todd Goldstein is well known for his impressive athleticism as a big man, and the North Melbourne ruckman may well be set to meet his match on Sunday.

Emerging St Kilda tall Rowan Marshall has been ranked the AFL's number one player over the last month, when it comes to Champion Data's ranking points, averaging 18 disposals, 7 marks, 33 hit-outs and close to 5 clearances a game.

"You don't really get a spell from him (Marshall). He's got a good leap on him and is a good mover," Goldstein said on Saturday. 

"As soon as the ball hits the ground, he tries to become that extra midfielder. He seems like he moves quite well.

"It's about trying to play to my strengths and I think movement around the ground is also a strength of mine."

Goldstein has been in fine form himself in recent weeks, most recently taking the points against the Magpies' Brodie Grundy.

The Roos' number 22 has been a vital pillar in the club's stretch of four wins from the last five games.

"It does seem like a switch was flicked but it's definitely something that was a few months coming," Goldstein said.

"It's been pleasing, the standard we're trying to set for ourselves. But the challenge now is to keep that standard and not let it drop.

"The best sides are able to play at that really high level for a long period of time."