Boro set to take second biggest ever following to Old Trafford.
Middlesbrough fans have been given an extra 1,450 tickets for their Capital One Cup clash with Man Utd, at the end of this month. Boro have already sold 8,600 tickets and are expected to comfortably sell their extra allocation.
Boro will become only the second team to take more than 10,000 supporters to Old Trafford.
Coventry City took 11,500 up the M6, back in 2007, when Michael Mifsud scored twice for the Sky Blues, in a shock 2-0 victory.