On this day in 2018, Britt Assombalonga was Derby's boo-boy but Boro's hero at Pride Park.
With just three games remaining in the 2017/18 season and a point separating the sides in the Sky Bet Championship table, it was a big fixture in the hunt for a Play-Off place.
Boro opened the scoring when Adama Traore - a constant menace to the Rams that afternoon - broke clear down the right and delivered a deep cross to Mo Besic.
The Bosnian collected the ball, drove for goal and fired in his first for the club.
A former Nottingham Forest favourite, Assombalonga was given a rough ride from fans of big rivals Derby throughout the game.
But the striker silenced the home support with Boro's second in the second half, slamming home after more great work from Adama.
Ex-Boro striker David Nugent set nerves jangling when he planted in a stoppage time penalty for Derby to halve the deficit.
But Boro held on for an important victory that all but secured a spot in the Play-Offs.
Watch goals and extended highlights in the video player above.
How many of Boro's team that day can you name? Take our quiz below to find out.