Hector Bellerin reveals Arsene Wenger's half-time changes that spurred Arsenal to comeback win over Koln

Arsenal went 1-0 down before coming back to win on a difficult night where kick-off was delayed by an hour because of the volume of visiting fans in the home section of ground

Hector Bellerin was one of the scorers as Arsenal came from behind to win (Arsenal FC)

Hector Bellerin has revealed that Arsene Wenger's tactical changes spurred Arsenal to come from behind and beat Cologne on a difficult night at the Emirates.

Kick-off for the Europa League clash was delayed by an hour due to many Cologne fans either travelling without tickets or purchasing tickets in home sections of the ground.

The visiting masses were celebrating when their team took an early lead through Jhon Cordoba's 40-yard strike and maintained it until half-time, but substitute Sead Kolasinac's volley, Alexis Sanchez's superb curler and Bellerin's 82nd-minute goal saw Arsenal to a 3-1 win.

"We were ready to play at 8pm but we had to play an hour late. You have to be ready, these things happen - not often, but you have to be ready," he said. "After not a very good start, the boss changed things and it worked, it gave us a boost in the second half and we're happy to go on and get the victory."

Arsenal missed out on Champions League qualification but Bellerin hinted they will hope to emulate Manchester United last season by winning the Europa League to secure a return to the top table.

"It's a new competition for us and we had to set the tone," he said. "We think we're one of the best teams in the competition and we have to show that on the pitch."

The win will provide an important lift ahead of a difficult trip to Chelsea on Sunday.

And Bellerin continued: "We already had confidence from (Saturday's win over Bournemouth) and this win, and coming back from losing, gives us a boost. We'll train hard these two days coming and we'll be ready for Sunday."