OXFORD United have experienced brisk sales for their Emirates FA Cup fourth round tie even before the opponents have been confirmed.

Tickets became available online on Friday night, with more than 2,500 sold over the weekend.

The figure has passed the 3,500-mark this afternoon - a third of the total available for home areas.

United's visitors on January 28 will not be revealed until Wednesday evening, when Newcastle United host Birmingham City in the third round replay.

Tickets are on general sale, but season ticket holders have until Wednesday afternoon to reserve their usual seats.