"We were masters in complication, everything was complicated", Mourinho said during his post-match interview. West Brom are a good team and they don't deserve to be that low and as they stuck into the game you realised that something could happen.
United's afternoon was symptomatic of their entire season.
Now on 87, they need just nine more points to break Chelsea's Premier League record set during the 2004-05 campaign. Last season we finished sixth and this season we are going to finish, hopefully, second, ' he told Sky Sports.
You look at the signings Mourinho has made.
"I trust in my work, that is for sure, I have no reason not to trust".
He is the first Spanish manager to win the Premier League title - a prize he says is the hardest to claim in Europe.
"Today is a sense of achievement because we've won the title in a way for the first time, I'd like to have won all other titles, so I'm extremely proud about this, and extremely aware of how fast these moments can go".
Sunday's title win now takes Guardiola's trophy haul as a coach to 24 following successful stints at Barcelona and Bayern Munich.
"Everything must be consistent until the last day".
"We are just trying to improve a little bit more".
In the first half, Mata almost found his way towards an early goal.
But flooding his attack with players did nothing to alter their inability to open up a well-disciplined West Brom defence playing their second game under caretaker manager Darren Moore. Lukaku, who scored 17 league goals for West Brom during a loan spell from Chelsea in 2012-13, does not want his old side to suffer that fate.
Few minutes later McClean nearly doubled West Brom's lead but his low shot went just wide of the target.