The midfielder last played on 15 December, as a substitute during the thrilling 4-4 draw with Bournemouth at Old Trafford.
He has since been sidelined with a calf problem he picked up before the trip to Aston Villa, and subsequently missed the Boxing Day victory over Newcastle United, as well as the 1-1 draws with Wolverhampton Wanderers and Leeds United.
The 20-year-old took part in the session ran by Darren Fletcher before our visit to Turf Moor, and the Scot said he would be assessed before a decision was made on his inclusion in East Lancashire.
“Kobbie Mainoo trained today, but we’ll see how he comes through tomorrow to see if he’s going to be in the squad,” he told MUTV’s Mark Sullivan.