Daniel Harvie looks set to miss the remainder of the season due to the injury suffered in MK Dons' Good Friday clash with Portsmouth.
Harvie limped out of the 1-1 draw with Pompey at Stadium MK and subsequently sat out Monday’s trip to Derby County. Jackson confirmed afterwards that the Scot is unlikely to play again this campaign.
“It's not too serious but we're running out of time so he probably won't be back this season,” Jackson said in his post-match interview at Pride Park Stadium.
There was better news from Jackson regarding fellow defender Jack Tucker, who was also absent on Monday due to a knock sustained in training. Zak Jules, who was forced off against Derby, is another that Jackson is hopeful won’t be out for too long.
“Jack picked up a little bit of a knock in training and didn't come through it in time,” the MK Dons Head Coach revealed. “We're hoping he'll be ok for Saturday.
“(Zak) tweaked his ankle a bit but we’re hopeful it's nothing too serious. He put in a really strong performance but we didn't want to take any chances. Again, we don’t think it’s anything serious.”