Aston Villa striker Jhon Duran has now been warned of what he must improve if he is to have a future in Unai Emery’s side. Emery and Monchi will be braced for a busy summer at Aston Villa as the Midlands club aims to prepare the squad for the Champions League. After confirming a fourth-place finish in the 2023/24 Premier League season, Villa returned to the big time in Europe, with the manager now needing a squad with the calibre to contend with Europe’s elite. READ MORE: What Aston Villa are planning to do amid PSR concerns The manager will be eager to retain all of the stars that assisted hi…