Pompey have been made joint-favourites to win League One.
Football League sponsors have installed Kenny Jackett's side as a 5/2 shot to win the title this season.
That's after his side opened up a three-point lead over Peterborough following their win at Coventry last night.
Pompey are the same price as Barnsley, who currently sit in sixth place - eight points behind the leaders.
Sunderland are currently third favourites with SkyBet at 7/2.
Pompey are also joint-favourites with 888 Sport at 3/1, along with Barnsley and Sunderland.
Betdaq have the Blues as joint-favourites with Barnsley at 14/5.