The South Korean's transfer fee has helped Leverkusen improve their squad.
In the summer Tottenham Hotspur went looking for reinforcements in the striking department after it became clear that both Roberto Soldado and Emmanuel Adebayor were no longer wanted at the club.
The South Korean forward cost £22 million from Leverkusen this summer, as reported by the BBC.
Now his former club's director of football has commented on how his club have benefited from the deal.
Rudi Voller told Der Spiegel yesterday that he was happy with the business he could so with the Son money:
“I find the outcry over the money from England a bit over the top. Son Heung-min went to Tottenham and for the money we got for him we could sign Kevin Kampl and Chicharito [Hernández]. We have profited from the English money.”
'Chicharito' has been a revelation, scoring 23 goals in 31 appearances for the German club since his summer arrival from Manchester United.
Slovakian playmaker Kampl has also been impressive since arriving from Borussia Dortmund in the summer - so it is fair to say that they invested the Son money well.
Tottenham fans won't mind though. The South Korean has had his injury issues but overall looks like being an excellent addition for the future.