Guardiola’s 95-year-old father was at the Etihad to witness his son’s last game in charge of the club.
The defeat marks the first time City coach Pep Guardiola has lost four in a row in his managerial career.
John Stones proved an unlikely scorer for Manchester City in a sizzling Sunday showdown at Liverpool.
Liverpool and Manchester City will resume their domestic duel in the FA Cup on Saturday after the pair reached the UEFA Champions League semi-finals.
Manchester United have now lost at the semi-final stage in their last four Cup campaigns.
