England goalkeeper great Peter Shilton says Craig Gordon is well worth the record fee Sunderland have paid for him.

Eyebrows have been raised at the size of the fee, but Shilton - who became the world's most costly goalkeeper when he joined Nottingham Forest for £270,000 in 1977 - believes a quality stopper is well worth heavy investment.

"They have been undervalued considering the position they play in the team," he told Sky Sports News.

"Goalscoring is the hardest job, but goalkeeping is second to that. You don't really have a good team without a good goalkeeper - that's how important the position is.

"So £9million doesn't seem a lot when you think of what's been paid for some of the outfield players."