After Derby County cruised past Northampton Town 4-2 on Tuesday evening to enter the FA Cup fifth round, Manchester United supporters have since gone on to buzz over a reunion with Old Trafford legend Wayne Rooney - with one fan warning of a potential 'masterclass' from their former hero. 

Rooney, who is United's all-time top goalscorer, left the Red Devils in 2017 to boyhood club Everton and has been on the move ever since - enjoying a brief stint in the MLS with D.C. United before joining Derby County last summer. Now, after helping his new team cruise past Northampton in the FA Cup fourth round, contributing to proceedings with a 77th-minute penalty, the former England international now faces a reunion with United at Pride Park - much to the bewilderment of Red Devils supporters.

Indeed, Rooney's incredible haul of 253 goals and 146 assists in 559 appearances for United (Transfermarkt) has warranted legendary status for the 34-year-old - with a bout against his former club making for a tasty fifth-round tie.

Here's how supporters reacted to the Rooney reunion on Twitter - find all of their best comments down below.

How will Rooney fare against United? Join the discussion by commenting below...