North Melbourne star Daniel Wells (pictured) troublesome Achilles injury has flared up again leaving him in serious doubt for Saturday nights clash with the Blues.

Wells has recovered from the quadriceps injury that he received in the last gasp win over Essendon last weekend but the injury that all but ruled him out of the 2015 season has again begun to cause some concern for the club.

Coach Brad Scott says while the injury is not as serious as it has been in the past, Wells is far too important to the clubs fortunes for any chances to be taken with the injury.