Pompey will go searching for a fourth successive victory when they make the midweek trip to Peterborough.
But it is the hosts – currently one place below their opponents in 11th – who are narrow 6/4 favourites with Sky Bet to triumph.
The Blues were 3-0 victors on their last trip to London Road in January 2012 and a repeat of that scenario is available at 28/1.
Those expecting a tighter encounter, however, might be tempted by 9/1 for either a 1-0 or 2-1 victory.
Please gamble responsibly and remember that odds are subject to change.
Sign-up to a Sky Bet account at www.skybet.com/pompey for more prices and some great offers.