Two goals from Ashley Fletcher as well as strikes from Marcus Tavernier and Marvin Johnson saw the Teessiders reach the next round of the competition.
Our Boro writer Joe Nicholson has dished out his marks following the match – scroll down and flick through our picture gallery to see them:
5. Dael Fry - 5
Allowed Cummings to cut inside on a couple of occasions. Looked a little rusty after missing part of pre-season. 5 Photo: Alex Davidson
6. Marvin Johnson - 8
Was the standout player in the first half, regularly finding space on the left. Registered a goal and assist. 8 Photo: Alex Livesey
7. Jonny Howson - 6
Plugged some gaps yet Boro lost control in midfield at times. Helped organise his team-mates late on. 6 Photo: Clive Brunskill
8. Lewis Wing - 6
Hard to mark as he played a big part in two of the goals. Was bypassed at times in midfield though. 6 Photo: Getty Images