Declan John should be fit for this weekend's big clash for Bolton Wanderers on the road against MK Dons.
The defender came off at half-time of Tuesday evening's 3-1 win against Lincoln City with a back spasm problem.
Ian Evatt's side sit five points from the play-offs heading into the weekend's encounter, while the Dons are three points from the automatic promotion places.
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Wanderers will be hoping to reduce their gap to the top six tomorrow with three points and Sadlier believes that home side will have to be wary of Bolton's creativity and threat in the final third.
And Evatt has revealed that defender John will be fit and available to take on the Dons after having treatment on the issue which sidelined him against the Imps.
Bolton captain Ricardo Almeida Santos is also back available again after missing the victory over Lincoln due to the birth of his son, as Evatt is wary of the test that the Dons will provide.
Evatt said: "Rico is back in today, which is positive. He’s had a couple of sleepless nights but other than that, he’s back in with a big smile on his face. It’s great to have him back and fully ready for Saturday.
"I think the world of Rico. I think he’s a huge, huge part of what we’re doing here, not just for the here and now but for the future as well.
"His (Declan John) back spasm has healed. I think he’s been to the spa and had some grapes and some fans on him today, some cucumbers on his eyes! Yeah, he’s available for Saturday.
"I don’t think they are as extreme football-wise as they were last season. I think last season there was a lot of possession but without a purpose.
"This season they seem to have more of an attacking threat. They’ve got some very good players at the top end of the pitch, some good options.
"Obviously, Connor Wickham has played at the highest level. You’ve got Scott Twine, whose figures and stats stack up against anybody and is a very talented young man.
"They’ve got some good players. We have to make sure that defensively we’re sound but I think we’ll get some opportunities on the transition. When we get those opportunities, we have to take them."
