Carlisle United upset the odds in their last away game - and they'll have to do so again in order to pull off a win at leaders Portsmouth.

Today's hosts are massive favourites with the bookmakers, with prices as short as 1/2 for a home win.

Those odds are offered by William Hill, BetVictor and BetFred, who cannot see past another victory for John Mousinho's unbeaten hosts.

United, though, overturned expectations at Bolton Wanderers two weeks ago, and the prospect of another notable away win for Paul Simpson's men is priced 11/2 by BoyleSports.

Bet365 offer Blues victory odds of 5/1 with SkyBet offering 19/4.

The draw at Fratton Park is 10/3.

Colby Bishop is Portsmouth's leading goal threat and he has the shortest odds to break the deadlock this afternoon.

The eight-goal striker is 4/1 to open the scoring.

For Carlisle, Sean Maguire is 11/1 with Joe Garner 12/1 and Jordan Gibson 20/1.

The hosts' first-scorer odds also include Abu Kamara at 13/2, Paddy Lane at 17/2, Regan Poole at 22/1 and Sean Raggett at 25/1.

Longer shots in the United ranks, meanwhile, include Callum Guy at 28/1, Jon Mellish at 40/1 and Jack Armer at 50/1.

Carlisle's last win at Portsmouth came back in 1984 with a 1-0 victory.

A repeat of that scoreline today is 16/1 while a second successive 3-1 away win for the Blues is 75/1.

A 2-0 Pompey victory is priced 13/2 while a 1-1 draw - the score the last time United visited Fratton Park, on 2016/17's opening day - is 7/1.