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Liverpool legend Graeme Souness isn't sure Daniel Sturridge will ever fulfil his potential.

The striker has struggled for form at club level this term and has often had to make do with a substitute role as Jurgen Klopp's first-choice attacking players shine.

He did continue his goalscoring run for England on Friday night though with the opening goal in the win over Scotland.

But Anfield great Souness isn't convinced and has warned if Sturridge isn't shining on a consistent basis now, he probably never will.

"Sturridge has that quality, but what he does not have, and which all successful teams want, is a work ethic," he writes in the Sunday Times.

(Image: Getty) (Image: The FA via Getty)

"That explains why two big clubs, Manchester City and Chelsea, have let him go and why he is now not in the starting team at a third big club, Liverpool. There have been some good judges who have doubts about him."

"Sturridge is 27 now and I would suggest he's not going to fulfil his potential. He either cannot maintain physically, because of his well-documented injuries, or does not want to mentally put in the shift as a team player that Jurgen Klopp demands."

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The striker is again expected to lead the line against Spain on Tuesday after Harry Kane left the England squad to return to Tottenham.

But Klopp is ready to bring in a new striker in January with Sturridge battling for his Anfield future.

With Danny Ings out for the season, Klopp wants cover but has often preferred Roberto Firmino up front this season.