United's FA Cup fourth round tie against either Norwich City or Fulham will be televised live on BT Sport later this month.
The clash against Premier League opposition will now take place on Sunday 26th January, kick-off 1pm.
The Blades will learn their opponents next week, when Norwich face Fulham at Craven Cottage in their third round replay.
United have already won on BT Sport this season, beating Cambridge in round two to set up last weekend's success at Aston Villa.
* Ticket news to follow in due course.