Lassana Diarra insists he's making the right choice in leaving Arsenal for Portsmouth.

Diarra has reportedly agreed personal terms and passed a medical, and is set to be unveiled as Pompey's latest signing later this week.

The 22-year-old, who only joined the Gunners from Chelsea last summer, was desperate for a move away from the Emirates Stadium after struggling to break into Arsene Wenger's first-choice side.

Diarra, though, is confident will he find regular first-team football under Portsmouth manager Harry Redknapp.

Diarra said: "My choice will shock and surprise people. Portsmouth; it is not Arsenal and it is not Chelsea.

"I know the trainer of Portsmouth and I know that he will play me."