After exercising their buy-back clause, Real Madrid have re-signed their youth academy product after two years with Juventus. Andrea Barzagli says stopping Alvaro Morata will be crucial as Italy look to get past Spain. Former Juventus teammate Giorgio Chilleni backs Alvaro Morata's success at Real Madrid ahead of their Round of 16 clash. Giorgio Chiellini delves into Spain's weaknesses and the future of Alvaro Morata. Alvaro Morata has said he has nothing to prove to Real Madrid or coach Zinedine Zidane upon his return to the Bernabeu. Earlier this month, Real activated a buy-back clause in the striker's contract to re-sign him two years after he left for Juventus, but there are reports the Spain international could be sold with several Premier League sides interested. During his previous spell with Real, Morata struggled to displace Karim Benzema in the starting XI, but he insists he is a different player now.