On the October 20 episode of ECW , Tatsu was involved in a number one contender 's match for the ECW title against Zack Ryder who he defeated to become the number one contender for the ECW Championship but he failed to win the championship the following week against Christian who was champion at the time . On the October 20 episode of ECW , Tatsu defeated Zack Ryder to become number one contender for the ECW Championship , although he failed to win the championship the following week against Christian .