The David Luiz Verdict  (Sky Sports)

Chelsea's decision to bring back David Luiz to Stamford Bridge was one of the shock stories of Deadline Day - but what is the pundit verdict?

Luiz left just two years ago for £50m - a fee that remains a world-record fee for a defender - but after picking up back-to-back Ligue 1 titles with Paris Saint-Germain, the 29-year-old has returned to his former club on a three-year deal for £30m.

Jamie Redknapp has described the move as "sensational" and Matt Le Tissier admits he's a "big fan" of the Brazil international - but Alan McInally is among those who remain unconvinced by his credentials.

Read on for the Sky Sports pundits' verdict on Luiz's return to Stamford Bridge...

Jamie Redknapp

It's sensational - the one you wouldn't have expected. It suggests to me that Antonio Conte wanted another centre-back so he has the luxury of playing three at the back sometimes.

It was a system he played at Italy and some clubs in his career. Obviously they have [Kurt] Zouma to come back in, they have [John] Terry and [Gary] Cahill.

It's a surprise. Talented? Absolutely. Yes, he makes bad decisions, he's bit rash at times, but when he's on his game, he's fantastic. You could even play him in midfield as well.

Paul Merson

I don't get it, I'm sorry. They sold him for a reason because he kept making mistakes. I watched him the other day give away a penalty against Monaco. I'm surprised PSG didn't drop him off!

He might have matured; if he plays in a three, he's the one who might come out with the ball like a John Stones; then it will cause other teams problems. The biggest thing for me about this deal is that he wants to come back to the Premier League - the biggest league in the world.

Niall Quinn

He was hot-headed; he wanted to do things he couldn't do and he got caught out in the Premier League but he's more mature. I like that phrase 'unfinished business' - it means he's got hunger and that's good. One big plus is that the manager wants him and that should stoke his fire.

Matt Le Tissier

I was always a fan of David Luiz. I know he's got a mistake in him, but as a footballer I love watching him play. He's so entertaining, and he will bring Chelsea something a little bit different.

If he plays in a back three, he'll also have N'Golo Kante in front of him to protect him a little bit and I think it's a fantastic move. I think Chelsea have done some good business.

Danny Higginbotham

People say he can be a little bit of a liability defensive-wise, but I think when you look at Conte, the success he had with Italy and at Juventus was playing a back three.

Luiz is a defender who can take the ball out, and I think if you look at the other signing in Marcos Alonso, he's a left-back and [Cesar] Azpilicueta could go over to the right, so there you've got two wing-backs as well.

For me it's a solution for Conte to now go and play a back three.

Tony Gale

He should be more experienced, he should have learned his lessons, but it just shows that there's a dearth of central defenders across the world - I think it's a real problem position now and Chelsea are going back to where they were.

The change of system, that could happen. I saw Juve plenty of times under Conte. He likes to play three strikers, so he could do that, or he could go four-diamond-two; it gives him a few alternatives. But I am surprised, I must admit, because they say never go back. He's a good player, but sometimes he is a bit of a liability I think.

Alan McInally

It's the best singing for 19 other Premier League teams, that's how good it is! He does have a mistake in him and he'll add a little bit of colour, but there's 19 other teams that will now be thinking: "He's got a mistake in him."

Alan Smith

I think David Luiz to Chelsea is really intriguing. We never thought we'd see him back in the Premier League so it would be fascinating to see how he does.