AFL leaders Adelaide will sweat on fitness tests on a key trio including Eddie Betts for Sunday’s AFL grudge match against Port Adelaide.

The ladder-leading Crows hope Betts can come back from a week off because of appendicitis, with defender Jake Lever and midfielder Brad Crouch also in the frame to return from injury.

Lever has missed the past two matches because of a hamstring injury and Crouch was sidelined for Sunday’s draw against Collingwood by a fractured cheekbone.