Paul Merson believes Georginio Wijnaldum would be “mad” to swap Liverpool for Barcelona this summer.

New Barca boss Ronald Koeman is believed to be keen to sign his compatriot as he looks to bolster his midfield.

Wijnaldum was key as Liverpool won the Premier League last season for the first time though is reportedly open to heading to the Nou Camp.

Though former Arsenal star Merson believes the Reds should do everything they can to keep former Newcastle star at Anfield.

Merson, in his latest Daily Star Sport column, wrote: “Liverpool would be mad to sell Georginio Wijnaldum - and he’d be mad to go!

Georginio Wijnaldum could swap Liverpool for Barcelona this summer

“They’ve just won the league for the first time in forever, they won the Champions League. They’re one of the best teams around.

“And the days of Barcelona poaching your best players are gone. How long will it take them to get back to the top?

“If Liverpool let Wijnaldum go they would be losing one of their chief midfield players. That sends them backwards.

“The lad gets big goals and his workrate is immense. He is under-estimated in my opinion. Doesn’t get enough credit.

“That’s going to be a major blow if he leaves. Their midfield three won them the league. It gave the full backs a chance to bomb on and the front three confidence to play.”

Liverpool have been linked with a move for Bayern Munich star Thiago Alcantara this summer as Klopp looks to strengthen the champions.

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Merson added: “They [midfield] are the engine and Wijnaldum is a very important part of that. They work their socks off. They’re like a machine. They all know their role. It works. Don’t break it up.

“I know there’s talk about Liverpool bringing in Thiago Alcantara. But he’s a different kind of player. He won’t have the same energy.”