By Tom Gott Former Manchester United winger Nani has insisted Ruben Amorim has all the qualities needed to be a success at Old Trafford. Amorim was named as United’s next boss on Friday, just hours before his Sporting CP side faced an Estrela outfit spearheaded by a 37-year-old Nani, who enjoyed eight successful years at United between 2007 and 2015. “All I can say is good luck,” Nani told Sport TV when asked for a verdict on Amorim’s imminent move to United. “He has done an excellent job at Sporting, and I hope he can do the same at United, which is a great club, one of the best clubs in the …