Chelsea boss Jose Mourinho used his ability to speak French to seal the deal for St Etienne defender Kurt Zouma.
In an interview conducted by beIN SPORTS as reported by Le 10 Sport, Zouma revealed a phone call with Mourinho helped to persuade him to join the Stamford Bridge club ahead of other suitors.
"Mourinho called me, he clearly told me he wanted me, and I jumped at the chance," said Zouma.
"He called me at night, and he speaks French very well, I understood and responded but I had nothing prepared.
"He told me to keep playing and we would keep up-to-date."
Zouma agreed a five-and-a-half year deal with Chelsea after St Etienne and the Blues agreed a fee.
The France under-20 international has remained with St Etienne and will report to Chelsea preseason training in the summer.
Mourinho also sold Zouma on Chelsea by selling himself as a nurturer of talent. The Chelsea boss helped to develop Raphael Varane at Real Madrid and gave him his first big break.
And Zouma admitted that example was a factor in his decision to join Mourinho at Stamford Bridge.
The Blues were busy in the January transfer window, as Mourinho also agreed deals for Mohamed Salah and Nemanja Matic.
Kevin de Bruyne and Juan Mata left the club last month to balance the books.