"I see a great improvement in the person, in the moods, in the face and body language", Mourinho told reporters today.
But the France global was far less impressive last term, scoring just eight goals in all competitions as off-field matters reportedly took their toll.
"If you just want one word - happiness". He's a happy guy, who's working well.
The Southampton defense, however, will be most hyped in this match as Virgil Van Dijk is likely to make his first start for the Saints since January.
"I'm very pleased with his attitude overall". We have this competition, we have to respect the sponsors, we have to respect the opponents and a lot of us are trying to do our best.
Romelu Lukaku has been in superb scoring form and we are backing him as our prediction in this game. "It's just a process, he doesn't play for a long, long time".
"I played Champions League with Ashley Young at right-back, not [Antonio] Valencia".
Oumar Niasse delighted with fresh chance at Everton
Add to that the fact that Everton failed to test Begovic regularly, and one sees the same problems from every match this season. Two midweek goals fired another reminder to his manager that the central striking role is his best position.
Manchester United will attempt to keep their unbeaten start to the season intact when they take on Southampton at St Mary's on Saturday.
City won 2-1 at West Brom in the third round on Wednesday, suffering an injury scare when Ilkay Gundogan, back in the starting line-up for the first time since December after a long-term right knee injury, hobbled off following a heavy challenge from Claudio Yacob.
Admittedly, they were playing against Championship Burton, but you can only beat what's in front of you.
On the other side, Manchester United will be missing Paul Pogba and Marcos Rojo, but otherwise have a clean bill of health as they look to at the least keep stride with their cross-town rivals atop the league table.
Pep Guardiola made nine changes to his first team squad and included players such as Ilkay Gundogan who hadn't featured in a match for nearly 11 months.
"Look, he doesn't play for six months".
Mourinho signed three players in the summer transfer window.
We should, rather than pitting them against each other, express delight at the unsafe dynamic on the left hand side now at Mourinho's disposal.