City boss Mark Hughes has made the energetic defensive midfielder his number one target in the January transfer window, and the same can be said of Harry Redknapp.
Diarra, 23, was ready to play for Redknapp again in the New Year, but the lure of £85,000-a-week wages look set to take him to Manchester City instead.
The ex-Chelsea and Arsenal player has been a star on the South Coast since arriving in January for £5.5m, but Pompey are looking to cut the wage bill and cannot refuse the money that City are promising to pay.
Redknapp will try and offer the same but it looks as though City are favourites to land him should Pompey cash in.
Tottenham last week