Since joining the Citizens, the Norway international has dominated the Premier League scoring charts.
In his emotional message on X, Haaland described Guardiola as a coach who “never stopped teaching,” even after major victories.
He said the Spaniard made excellence feel routine, constantly demanding improvement and setting new challenges regardless of past achievements.
“A coach who never stopped teaching. It sounds crazy to say this, but you made greatness feel normal,” Haaland wrote on X.
“Even after hat-tricks, wins and trophies, there was always another lesson, another challenge and another level to reach.
“That mentality changed this club forever and changed me too. The honour of a lifetime to work with the best. Thank you for everything, boss.”