Borussia Dortmund chief Michael Zorc says the club is in talks with Dan-Axel Zagadou over a new long-term contract amid reports linking him with a move to Manchester United.
The Manchester Evening News understands United are provisionally looking at as many as four senior signings this summer, with a new centre-back under consideration.
United had explored the possibility of signing two new central defenders last summer but finished the window with only one in the shape of Raphael Varane.
