The £37.1million signing made his Reds debut, of course, against Cardiff City at Old Trafford on Tuesday – a subtly impressive first outing that promises plenty more to come as he settles into his new surroundings.
It's sessions at the Aon Training Complex during the week and between matches where squad camaraderie and new relationships are built and understanding with his team-mates is fostered. Mata has already made a positive impression, as Phil Jones points out: "He has definitely lifted spirits in the dressing room and especially in training."
Tuesday's 2-0 win over Ole Gunnar Solskjaer's Cardiff team, aligned with Mata's arrival, has boosted confidence and morale after a testing start to 2014. And, as our exclusive gallery shows, the players are all in positive mood.
To view the gallery, click the main image above.