Jay Rodriguez scored the only goal of the game against a lacklustre United side and the result meant that Manchester City were crowned Premier League champions. "So happy to be able to share another trophy with our incredible fans", the 32-year-old Belgian defender said on Twitter. "I knew that sooner or later that would be and if I was in that position I would be very upset if someone said they won the title because Manchester United lost", he said.
"Probably because I won eight championships I was not on the moon with the victory against them because that doesn't make me feel super-happy". I think with my experience you don't win titles with inconsistency.
He and Mourinho are old rivals from their time in Spain when the United boss managed Real Madrid.
"I congratulate them", Mourinho said. I have been lucky to win three but so many I have missed as well.
'I saw lots of people on the moon because we won against Manchester City.
West Brom presented a different challenge to Manchester City but the players looked complacent. 'We were deservedly punished, ' he said.
The defeat took City to 16 points clear of United.
By winning the title with five matches remaining, City have equalled the English top-flight record (Manchester United in 1907-08 and 2000-01, and Everton in 1984-85 all won the top-flight title with five games to spare).
"We did it! An incredible journey to get here".
Mourinho suggested his players might have over-reacted to the win against City at the Etihad. City skipper Vincent Kompany has now won three Premier League titles since joining 10 years ago.
'We were masters in complication, everything was complicated, ' he told Sky Sports.
It is the fifth time City have been English champions and the third time in the last seven seasons.
Guardiola had planned a day of golf with his son Marius on Sunday, so the Spaniard might have learned of his first Premier League while on the course.
"We're all winners and we want to win and in those games unfortunately we didn't".
He also conceded it was sweet to triumph in a country where some critics claimed his purist principles couldn't flourish.
Few expected it to happen on Sunday.
Although, observers know that it was a matter of time before City is crown the champion of the lead.
Now, driven on by stars De Bruyne, Raheem Sterling and David Silva, Guardiola's men can focus on establishing themselves among the Premier League's all-time great teams.
The consistency of Arsene Wenger's Invincibles has to be admired and they are still the only side to have gone through a Premier League season without losing.