The former Man United striker believes that staying at Dortmund may remain the better option for Sancho.
Speaking to German publication Bild, Rooney said: “Dortmund is a great club with great fans, they trust their young players and you can see that in Sancho and the progress he has made in the last 12 months.
“Now Jadon has to ask himself whether he would get the playing time he gets in Dortmund when he moves to England, or would he just sit on the bench?
“Playing time is so important for a young player like Jadon, so if he gets the most playing time in Dortmund, he should stay there.”
Sancho remains one of United’s top targets, though there is an admission within Old Trafford that they may have to park their interest until next summer, when Dortmund might be more open to offers.