Milton Keynes Dons boss has explained that George Williams wasn't quite ready to make his return to the team's match day squad against Lincoln City.
Williams has been out for a while with a calf injury and earlier in the week there appeared to be hope that he could make a return in the team's first home league fixture against Lincoln City.
However, Martin has explained that while he is fit and hasn't had any new setbacks, he still felt as if the centre-back still isn't quite ready to return to match action just yet.
Speaking after his side's 2-1 loss to Lincoln, Martin explained: "He's fit, but he's only trained a week. He missed all of pre-season, he only had the first week and hurt his calf, so he's only had four days really with the group."
"I didn't see any changes needed in defence, I don't think he's ready to start a game and I just wanted a bench we had loads of attacking options on."
He added: "George is fine, he'll be game ready soon. We have a game lined up for the players that need some minutes, Richard [Keogh] and George especially and the ones coming back in the next couple of weeks so that will be really good for them."
"Then, they'll be fully in contention for the squad. I felt it was a bit too early for George and I also had defenders on the pitch and people that can play in that position if Warren [O'Hora] got injured, or Dean [Lewington]."
"Jordan Houghton can drop back there, Regan Poole can play there, Callum [Brittain] could go back there so I had plenty of options really."
He concluded: "I just wanted a more attacking bench. George will be back with the group soon and I'm sure he'll be back in the squad sometime soon."