Liverpool manager Jurgen Klopp has lauded Andy Robertson after his first three years at the club.
An £8m signing from Hull City in 2017, Robertson is now regarded as one of the world's premier left-backs.
And Klopp has praised Robertson for the improvement he has made at Anfield.
"I really don't like that we always talk about players [in terms of] 'that's the price'," Klopp told the club's website.
"Andy Robertson, I'm not sure we would have paid £30 million [at] that time but it would have been worth it.
"It was not about the money that we took him - your price can be £8m but if you are not good enough then £8m is pretty expensive! It's a lot of money for somebody who is not good enough, that's how it is.
"Andy Robertson was somebody we brought in because he was a player we thought who could really help us. It was always clear that he had to improve a few things but a few things were already then that good that we said: 'OK, come on, let's give it more than a proper try.'
"And I couldn't be more happy because all the things I thought about him, he's much better. He's a much better person, he's a much better football player, he has an incredible personality.
"So, a great three years. An absolutely massive win-win situation for a wonderful lad from Glasgow and for the club as well, so perfect fit."
