Postecoglou guided Tottenham to a 1-0 victory over Manchester United in the Europa League final last month to clinch the club's first European prize in 41 years and secure a place in next season's Champions League. But the 59-year-old Australian paid the price for Tottenham's worst domestic season since they were relegated from the top flight in 1976-77.
Tottenham lost 22 of their 38 Premier League games to finish 17th in the table, above only relegated trio Leicester, Ipswich and Southampton. Son, though, in an effusive tribute on Instagram said Postecoglou had transformed the club. "Gaffer. You've changed the trajectory of this club," wrote Son.
"You knew what we were capable of all along. You did it your way. And your way brought this club the best night it's had in decades. We will have those memories for life." Son said he had formed a close relationship with Postecoglou.