Arsenal managed to secure a tough 2-1 win over Sevilla thanks to goals either side of halftime from Gabriel Martinelli and Gabriel Jesus.
With the win, the Gunners now move to the top of Group B and are in a commanding position to finish the group stages on top with back-to-back home games against Sevilla and Lens to come over the next couple of weeks.
Arsenal knew what a win would do for its chances of progressing to the knockout stages and, conversely, what a loss would do as well.
The Gunners should have been in the lead after the first 10 minutes as Gabriel Martinelli was through on goal but had his effort denied by Orjan Nyland.
However, the young Brazilian made up for his early miss after being played through by Gabriel Jesus as he rounded the Nyland and slotted home to give his team the lead.
Jesus then scored a goal of his own as Arsenal took control of the contest…but it lasted just minutes as the Gunners conceded from a corner as Nemanja Gudelj headed home past David Raya.
Arsenal will now turn its attention to Sheffield United in the league on Saturday but will also be sweating on the fitness of several players as Jesus after he picked up a hamstring injury, while Thomas Partey didn’t feature at all in Seville after picking up a muscle injury the club confirmed.
The Gunners currently sit second in the league table, two points behind Tottenham, who are also unbeaten through nine games.