Romelu Lukaku has warned Ross Barkley he will fail to claim the heights expected for him if does not add regular goals to his game.
The Everton midfielder emerged from a testing start to the season with what Ronald Koeman described as his 'best performance' since he became manager, when scoring in the 2-0 win over West Ham.
Lukaku believes Barkley has the potential to 'become the best player in English football' but the 22-year-old is struggling to even get in the England squad at present and faces an anxious wait to see if he will be selected by Gareth Southgate on Sunday for the games against Scotland and Spain.