Pompey have completed the signing of Denver Hume from Sunderland for an undisclosed fee.
The left-sided player – who can play as a wing-back or as part of a four-man defence – has penned a two-and-a-half year deal, with the club option for a further 12 months.
Blues boss Danny Cowley said: “Denver is a young player who wants to get better every day and he brings us some outstanding athleticism and energy.
“He will add quality in the final third and we really like his wonderful ability to receive the ball on the back foot and play forwards.
“We’re a forward-thinking team and the attributes he possesses are really aligned with our way of playing.
“It’s great that he can play as a left wing-back or on the left of a back four because it gives us the flexibility we want in our squad.|
"He was a breath of fresh air from the moment we started talking with him and you can see his ambition."
“He has all the attributes in his toolkit to be a really good defender and we’re looking forward to working with him.
“Everyone we contacted spoke so well of Denver in terms of his professionalism and the way he conducts himself.
“He was a breath of fresh air from the moment we started talking with him and you can see his ambition. He also loves football and for us, that’s really important.
“I’m really excited about the business we’ve done this January and I believe we’ve made some real progress.”
Hume scored three goals in 84 appearances for the Black Cats, having joined their academy at the age of 10.
He appeared at Wembley in March 2019 when the Wearsiders were beaten on penalties by Pompey in the EFL Trophy final.