Pompey have completed the signing of midfielder Michael Jacobs.
The 28-year-old has penned a two-year deal, with the club holding the option for a further 12 months.
He left Wigan at the end of last season and will wear the number 24 shirt during his time at Fratton Park.
Blues boss Kenny Jackett said: “Michael’s an exciting player with good Championship experience and an excellent track record of getting out of this division.
“He adds to our attacking options and I see him as a very natural number 10 in our 4-2-3-1 system, while he can also play in the wide positions.
“A player who likes to get on the ball and create things, we hope he can be the link between our midfield and attack.
"He adds to our attacking options and I see him as a very natural number 10 in our 4-2-3-1 system."
“Michael performs with a lot of enthusiasm and has the ability to go past people. He can drop his shoulder when 1v1 and take the ball either way comfortably.
“I’ve worked with him before at Wolves and he did very well there, as he’s done at all of his previous clubs.”
Jacobs began his career with Northampton, where he impressed enough to earn a move to Championship side Derby.
He was then signed by Jackett – initially on loan – at Wolves and helped them secure the League One title with a record points tally of 103.
Jacobs moved to Wigan in the summer of 2015, where he picked up a medal for topping the third tier table on two more occasions.
He made a total of 188 appearances for the Latics and scored 32 goals, including a fine solo strike against Blackburn back in June.