The Reds centre-back played four times under Sir Alex after making his debut in the Capital One Cup victory against Newcastle at Old Trafford last year. His second loan stint at London Road was designed to give him more regular football but both he and Davide Petrucci ended up missing the climax of the Championship season.
After starting at right-back in the friendly win at Crewe Alexandra, he shifted into the middle following Nemanja Vidic's substitution and looks back to peak form.
"It was a massively frustrating injury," he conceded to ManUtd.com. "I'd had a taste of the first team and was going on loan to play more first-team football.
"So, to get such a bad injury that kept me out for the season, five or six months out, I was obviously devastated. Certainly, it was my first-ever muscle injury. I've broken a couple of bones in my leg but, muscle-wise, it was my first real injury and to be out for so long was massively disappointing.
"But I've been back since the first day of pre-season, I feel good and it couldn't have gone any better really. I've played every game, for the entire game, and not had any problems injury-wise so I'm back and feeling good and feeling fit."
The 21-year-old's next challenge is to catch the eye of manager David Moyes and strive for a place in his plans with a number of games on the horizon.
"Of course, with all the new people, the staff and the manager, everyone says the first impression is massive," he admitted. "That's why I'm so