All you need to know about League Two clash
Pompey and Oxford both have FA Cup fourth round clashes to get excited about next Saturday.
But at Fratton Park this weekend they will both be fully focused on the battle for automatic promotion.
The hosts are two places and four points behind United in third, but do have a game in hand.
Michael Appleton’s side – who have also reached the area finals of the Johnstone’s Paint Trophy – were beaten in their last game at home to Bristol Rovers.
But that was just their fourth league loss of the season – one more than Pompey – and they have triumphed seven times on the road.
Adam McGurk’s equaliser ensured the sides drew 1-1 at the Kassam Stadium earlier in the season.
And the Blues will now try to close the gap on the top three by inflicting a first Fratton defeat on Oxford since 1997.
Matt Clarke could return after being ineligible to feature against parent club Ipswich during the week, while new loan signing Ryan Fulton is available for selection
Danny Hollands (leg) and Paul Jones (knee surgery) are both still missing for the Blues.
Former Pompey striker Ryan Taylor (groin) is sidelined for the visitors, while James Roberts (ill) and Danny Rose (ankle) are both doubts.
Chris Maguire – who had a spell at Fratton Park in 2012 – has returned to Rotherham after his loan deal extended, but Oxford are in talks over an extension.
Read what Paul Cook had to say about the game or subscribe to Pompey PlayerHD to watch extended interviews with the manager and Michael Doyle and relive some classic meetings between the sides.
HEAD TO HEAD
Pompey: 22 Wins
Oxford: 18 Wins
At Fratton Park
Pompey: 15 Wins
Oxford: 3 Wins
Oxford 1 (Sercombe)
Pompey 1 (McGurk)
September 19 2015
Pompey PlayerHD subscribers can listen to live online commentary from Fratton Park from 2pm on Saturday.
There will be post-match reaction on the website, Pompey PlayerHD and our official YouTube channel, with extended highlights to follow at midday on Sunday.
Local listeners can hear commentary on Express FM or BBC Radio Solent (not online), while The News will also have extensive coverage.
There are now only a few Family Section (where fans must be accompanied by a junior) and restricted view tickets available, which cannot be bought online.
Pompey are 5/4 favourites with Sky Bet to collect all three points, while the visitors can be backed at 23/10.
Click here to read our betting preview and remember to register at www.skybet.com/pompey to earn money for the club whenever you have a flutter.
ALSO IN LEAGUE TWO
Bristol Rovers v Plymouth
Cambridge v Hartlepool
Carlisle v York
Exeter v Accrington
Mansfield v Luton
Newport v Dag & Red
Northampton v Morecambe
Notts County v AFC Wimbledon
Stevenage v Barnet
Wycombe v Leyton Orient
Yeovil v Crawley