Yet the Blues' Champions League assault was ended, quite emphatically (5-1 on aggregate), at the quarter-final stage by Liverpool. League One side Wigan Athletic knocked City out in the fifth round of the Emirates FA Cup.
This is not to downgrade their achievement in winning the Premier League and League Cup but it wasn't really a case of all or nothing. Nor, as it turned out, was Liverpool's campaign this term. For all the talk of them being among the league's greatest-ever teams, Jurgen Klopp's men ended up falling well short of any Treble.
And it seems to happen most years - stories emerge predicting the leading clubs will repeat United's feat but, thus far, they always fail.