Portsmouth boss Harry Redknapp believes new signing Jermain Defoe can revive his flagging career at Fratton Park.
Defoe, who has been unable to secure a place in the Tottenham starting line-up, moved for a fee reported to be in the region of £9m.
“He needs confidence, needs to be believed in and needs to play regularly,” Redknapp told BBC Radio 5 Live.
“He is a terrific finisher and has always scored goals. With a run and confidence he will show that he is a top, top goalscorer.”
The move went through despite the collapse of Benjani’s proposed move from Portsmouth to Manchester City. Muntari’s deal fell through as City were unable to complete the move before the transfer window closed.
Defoe’s contract was set to expire at the end of next season and Spurs were keen to avoid losing him on a free transfer.
The forward was left out of Fabio Capello’s first England squad for the match against Switzerland on 5 February.
“I haven’t been playing football,” Defoe said. “Hopefully I can play football here [at Portsmouth] and get myself back in there. When you haven’t been playing football, you can’t expect to get in the England squad. I totally understand that. I just want to play football and score goals.”
Defoe, who joined Tottenham in February 2004 from West Ham for £7m, was given more than twice his existing wages by Portsmouth.
Redknapp, who managed Defoe at West Ham, is confident the striker can rediscover his scoring touch.
He added: “I had him as a 15-year-old kid and he scored goals every single week and in every game he played in. Hopefully he will bring us goals.”
Redknapp was puzzled at the collapse of Benjani’s move, saying: “Our chief executive Peter Storrie was told the deal was done and then obviously after midnight we got a message saying the forms hadn’t gone through for some reason.
“I think Peter’s on the case with the Premier League to see where we go with it.”