The reigning Champions League title holders signed Turan on a five-year deal from Atletico Madrid over the summer transfer window but have been unable to register the bearded winger due to the FIFA transfer ban that was in place.
Barcelona will be able to register Turan and any other players they sign over the next transfer window which opens in January but the club had hoped to replace the registration of Rafinha who sustained a long term injury with the Turkish international.
Kick-Off: 19:45 GMT
Stadium: Camp Nou, Barcelona, Spain
Barcelona probable starting line-up: Stegen, Jordi Alba, Javier Mascherano, Pique, Dani Alves, Andres Iniesta, Sergio Busquets, Ivan Rakitic, Neymar, Luis Suarez, Haddadi
Bayer Leverkusen probable starting line-up: Leno, Donati, Tah, Papadopoulos, Wendel, Kramer, Bender, Bellarabi, Hakan Calhanoglu, Kampl, Kiessling