Adelaide defender Jake Kelly has been ruled out of Sunday’s game against North Melbourne with delayed concussion.

Kelly suffered a head knock in the third quarter of Sunday’s loss to Melbourne at the MCG.

He was assessed on the day and passed all relevant concussion tests and remained well for two days post-game.

He then developed minor symptoms on Wednesday and on review on Thursday was diagnosed with delayed concussion and did not take part in the main training session at Adelaide Oval.