BRADLEY Dack says he arrives at Sunderland with a point to prove after his Blackburn exit - and is delighted to once again link-up with "good-hearted" Tony Mowbray.

Rovers allowed Dack to leave the club at the end of last season because they couldn't guarantee the attacking midfield regular football, bringing to an end his six-year stay at Ewood Park.

The first three of those years were memorable for Dack, but he then suffered a lengthy lay-off because of two separate cruciate knee injuries. He returned to full fitness but had to settle for a squad role at Blackburn last season, and after joining Sunderland, Dack - who was once one of the most sought-after players in the EFL, is desperate to show he still has a lot to offer.

"I had three really good years at the club (Blackburn), then two when I had a couple of bad injuries," he says.

"I managed to come back from them and did OK but I still feel like I have a point to prove, especially to that club.

"And I have the perfect platform to do it here. I know where the club wants to be, it's where I want to be, let's hope we can take it forward."

Dack has put pen to paper on a one-year deal with Sunderland, with the Black Cats having the option to activate a 12-month extension.

Talks took place throughout the summer and Dack was keen on the Sunderland switch as soon as learnt of the interest. The size of the club and the fanbase was an obvious pull, as was the opportunity to once again work with Mowbray, who was previously his boss at Blackburn.

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"I can't say a bad word about him, he's just a top guy, a top person, a good hearted person," Dack told the club website.

"That's massively important in football. We got on really well in the five years I was with him. He helped me out a lot on and off the pitch. I can't thank him enough and it's nice to join up with him again.

"It feels brilliant to be here. It's been a bit of a drawn out process, we've been in dialogue or a few weeks but I'm really happy to finally get it done and come and play for a massive football club.

"I think it's easy to see what drew me to the club - the size, the training ground, I knew a few players from my previous club and they only had unbelievable things to say about the club, so it just worked for me at this time in my career and I like to think it works for the club as well.

"The conversations we've had in the last six weeks have all been positive. It's taken a bit of time to work a few things out but I'm buzzing we finally got there in the end and I can't wait to pull on the shirt."

Dack believes Sunderland are well placed to build on last season's success, when Mowbray's side made the play-offs in their first year back in the Championship.

"It would have been almost like a fairy-tale to go back to back," he said.

"It wasn't meant to be but there's definitely a foundation we can progress from.

"I'll be here to bring some experience to the team, hopefully goals, assists and try to help the young lads along the way. Who knows what can happen this season."