"Mudryk has no value anymore – he’s a lost cause and Chelsea won’t make any money on him," the World Cup winner said.
"He is so raw and he’s not getting better under many managers – there’s no improvement.
"Who would you want to buy Mudryk? I wouldn’t even buy him for ten million at the moment. In fact, I wouldn’t even buy him for £1m. Why would you want to spend money on a player who is not in any way productive.
"He’s been here 18 months and I know it’s been difficult for him given his circumstances at home in Ukraine, but judging from what I’ve seen, I really worry that Chelsea have signed a dud in Mudryk and they must replace him.
"I was bought for £2m in 1996 and I thought that was a lot! Mudryk was bought for £70m or something – it’s insane!"
Live on DAZN: Jaron Ennis vs. David Avanesyan on July 13. Click here for details.