We left it late on Saturday as an own goal from Yerson Mosquera was enough to tilt the tie in our favour against Wolverhampton Wanderers at Emirates Stadium.
Bukayo Saka's earlier corner had already forced Wolves into an error at the back, as goalkeeper Sam Johnstone was unable to prevent the ball from deflecting off his back and into his own net.
The three points looked to have slipped away when the game ticked into the 90th minute, as Tolu Arokodare headed Wolves level.
We fought on deep into stoppage time, however, and salvaged the victory through substitute Gabriel Jesus, who forced Mosquera into the mistake.