RB Leipzig supervisory board chairman Oliver Mintzlaff has warned suitors of winger Yan Diomande that he would not sell the 19-year-old for any price this summer, even if the likes of Liverpool or Manchester United exceed a widely reported asking price of $117 million (€100 million). Signed permanently from Leganés last summer, Diomande has exploded in the Bundesliga, with his return of 12 goals and eight assists turning him into one of Europe’s most-wanted forwards ahead of the summer window. Clubs were already braced for the need to make Diomande the most expensive sale in Leipzig history, but Mintzlaff has now insisted that he will do what he can to convince the Bundesliga side not to sell regardless of the price. “I’m on the supervisory board and am not the sporting director, but I can say this: If I were the sporting director, I wouldn’t sell this young player who hasn’t even been with us for a full season yet, no matter what price is offered,” he told Sky Sports .…