The Nigerian marksman has troubled Liverpool in his two Champions League outings against them this season Join the Miguel Delaney: Inside Football newsletter and get behind-the-scenes access and unrivalled insight Join the Miguel Delaney: Inside Football newsletter Join the Miguel Delaney: Inside Football newsletter Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice As Alexander Isak proves, Liverpool can sign strikers who