Sky Germany reporter Jesco von Eichmann told Sky Sports News that Sancho was now certain to leave Dortmund as long as an offer of at least £100m arrives.
"He will leave Dortmund this summer, that's for sure,” von Eichmann told Sky Sports News. "It's not clear to which club he will change.
"Manchester United is one of the big clubs that are interested, that I've heard.
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