De Bruyne has shone for City since joining in 2015, but he originally struggled in England having spent a spell with Chelsea.
The Belgian joined Chelsea in January 2012, spending half a season on loan at Genk.
De Bruyne remained in Germany that summer, penning a season-long loan deal with Werder Bremen.
And after impressing for the Bundesliga team, De Bruyne has revealed that then-Borussia Dortmund boss Klopp was interested in signing him. But Mourinho said no.
“When I was at Chelsea, there was so much in the press about my relationship with Jose Mourinho,” De Bruyne wrote for The Players’ Tribune.
“But the truth is that I only ever spoke to him twice. The plan was always for me to go on loan for a bit.
“So I went to Werder Bremen in 2012, and that season went great.