The Citizens' 3-1 victory over Tottenham Hotspur on Saturday evening meant that the Red Devils had to avoid defeat against the league's basement side to keep the title race alive.
A shocking Jay Rodriguez goal gave West Bromwich Albion a rain-soaked 1-0 win over Manchester United at Old Trafford on Sunday, meaning United can not catch crosstown rivals Manchester City in the race for the Premier League crown.
Winning the title by two points from Chelsea, in the Champions League United saw off Barcelona in the semi-finals and, in the final, beat Chelsea on penalties in the Moscow rain.
City captain Kompany watched the match at the house of his Mancunian wife Carla Higgs, who invited her United-supporting father to join the party.
City's form away from home has been remarkable this season, but in what would surely be one of the best games the Premier League has ever seen, 1998/99 United's irresistible knack for an injury-time victor proves too strong for their rivals.
Guardiola praised the mentality of his team which responded to its first crisis of the season with a stunning opening burst to leave Tottenham floundering.
"It's the same feeling as the first time, you can't describe it", Kompany told Sky Sports. "We have handled the pressure, good and bad situations, all season".
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That's an impressive number for a movie that reportedly cost about $3.5 million to make and was shredded by critics. This weekend's almost $33 million gorss pushes its 10-day total of $100 million against a $17 million budget.
With the title wrapped up without kicking a ball thanks to United's shock defeat, City can reflect on a success crafted completely in the image of boss Pep Guardiola.
5 - City match the English top-flight record by claiming the title with five games to spare, equalling the efforts of United (1907-08 and 2000-01) and Everton (1984-85).
"Real Madrid, years ago (in 2004), lost six games (from seven) and didn't win the league".
But Albion are bottom of the table and few give them a chance of upsetting United.
"We will try hard to be champions in front of our fans at the Etihad Stadium because they deserve it", Guardiola said. Arsenal look rattled and struggle to retain possession as they chase Pep's team down. "Probably because I won eight championships, I was not in the moon with the victory against them because that doesn't make me feel super happy".