The race is on to sign a Premier League winger this summer with Leeds United one of many clubs interested, but Dean Henderson says he is trying to convince him to join Sheffield United. Daniel Farke’s side are on the lookout for a new winger this summer after rubber-stamping the sale of Crysencio Summerville to West Ham, with Leeds set to receive an initial of £25m plus more in add-ons. Having already lost Ian Poveda and Jaidon Anthony this summer, Leeds are stretched out wide even with the surprise return of Brenden Aaronson. The USA star is naturally a no.10 but can play on the left wing. Li…