Didier Drogba, John Terry and Ramires scored after the interval to take Chelsea to the brink.
A win against Crystal Palace on Sunday will give them the EPL title after a gap of 5 years.
Mourinho was full of praise for his team
“It’s fantastic because I know April is the month where everybody was waiting for Chelsea to slip, was waiting for Chelsea to lose points, lose one game, lose and draw, take this title race to the last couple of matches.But it was exactly in this month – a month with problems, a month without Diego Costa, without Loïc Rémy, with Drogba and Oscar playing striker, no other solutions, just this small group of players we have – where we were phenomenal.We were tactically phenomenal, team spirit, the team ethic, the way we defended, the way we were clinical with our goals, the stability we showed in every game. Everyone expected us to drop points against Arsenal and Manchester United but April was the month that we destroyed opponents. We won every game except the draw against Arsenal, so I’m very pleased. Now we just need three more points.”