Portsmouth have completed the signing of former Werder Bremen defender Dusko Tosic on a free transfer.
The 25-year-old Serbian was released from his contract at the Bundesliga side earlier this month following a series of discipline problems.
With Pompey rooted to the foot of the Premier League table, Tosic has been added to bolster the team's back-line, but he arrives at Fratton Park with a worrying reputation.
After Tosic's release from Bremen, manager Klaus Allofs had said:"After another bout of misconduct in the last couple of days we are happy this chapter is closed.
"We have never experienced a player acting that way."
He is expected to go straight into the squad for the FA Cup fifth round clash with neighbours Southampton on Saturday after agreeing an 18-month contract.