Scott Parker’s men were unable to capitalise on their stalemate against Leeds United last week following their trip to Portsmouth at the weekend.
Despite extending their unbeaten run to 17 in league and cup, the Clarets were unable to pick up the three points and lost further ground in the race for automatic promotion as a result.
As for Oxford, they were held to a frustrating 1-1 draw at home to Bristol City, who finished the game with nine men.
Nevertheless, the U’s have turned around their form in recent weeks under new boss Gary Rowett and are now unbeaten in their last nine outings.
Both sides have some injury concerns to contend with heading into Tuesday night’s encounter, so here's an early look at the team news for both outfits:
9. Elliott Moore (Oxford) - out
The U’s captain is two or three weeks away from returning to training after suffering an adductor injury in the win at Millwall on New Year’s Day. Photo: Cameron Howard
10. Ben Nelson (Oxford) - out
The centre-back is making steady progress in his recovery from a long-term quad injury, but is unlikely to feature until the latter stages of the season. Photo: Dan Istitene
11. Max Woltman (Oxford) - out
Remains a long-term absentee having failed to make a single appearance this season. Photo: Pete Norton