63' After signing on Saturday, Mata said he couldn't "wait to play alongside him" and now the wait is over, as Wayne Rooney comes on as substitute for Robin van Persie. That trio working together in tandem remains a treat for Old Trafford to look forward to.
75' From Patrice Evra's pass, Mata clips a delicate shot towards goal, only for a Bluebirds defender to intervene and head it wide.
85' An impressive debut comes to an end as Mata is rested for the closing minutes, with Adnan Januzaj coming on to replace him.
Full-time: The Reds have beaten Cardiff 2-0 and Juan Mata can feel pleased with his performance.
Post-match: Mata is voted Man of the Match on the club's official Twitter account. The Spaniard received 68 per cent of the votes, well ahead of fellow nominees Chris Smalling and Ashley Young.