After your bonus hour, that's it from tonight's Europa League.

There's a Premier League game tomorrow night, so join us for that...

Arsenal

Arsenal manager Arsene Wenger speaking to BT Sport: "We had a slow start and there was an accidental goal. After that it was important not to concede and panic and put more pace into our game. From then. we controlled the game and won convincingly in the end.

"I think Sanchez is still running after his best form. He is a fantastic football player but physically he has just come back. But he has it in his locker to do something special, which he did.

"We want to do well in all the best competitions and I had an experienced team today, even though I made nine changes. They are all top class players, there is no hierarchy in the squad."

Arsenal

Arsenal’s Hector Bellerin speaking to BT Sport: “It’s a new competition for us so we had to set the tone. We think we are one of the best teams in the competition so we have to show that on the pitch.

“I’m very happy for the victory. We were ready to play at eight o’clock, but these things happen. We started a bit with cold feet but after that it just worked.

“The win in the league against Bournemouth and today’s win, coming back from behind, gives you a boost. We will train over the next two days and then be ready for Chelsea.“

Image source, Getty Images

Sead Kolasinac’s goal was the 200th scored at home in European competition under Arsene Wenger – totals now stand at 125 goals at the Emirates, 69 goals at Highbury & 8 goals at Wembley.

Arsene Wenger has now beaten 57 different clubs during his tenure as Arsenal manager (from 64 different teams faced).

Image source, Reuters

In the other game in Arsenal's group tonight, Red Star Belgrade drew 1-1 with BATE Borisov, meaning that the Gunners are two points clear at the top after one game.

John Southall
BBC Radio Five Live football reporter

So victory for Arsenal, but the game seems almost irrelevant after the unsavoury pre match trouble. Uefa will investigate and numerous questions need to be answered, most significantly how did the segregation break down so alarmingly with thousands of Cologne fans in Arsenal areas, including the family section?

It was a good win for Arsenal in the end with two terrific goals from Sead Kolosinac and Alexis Sanchez, but it's a night that won't be remembered for the football.

Image source, Reuters

A far from routine on and off the pitch - but a strong second-half showing gives Arsenal a good win in the end.

Champagne stuff from Arsenal now as they put together a flowing, trademark move of one-touch passing and movement.There are backheels from Jack Wilshere and Olivier Giroud, Reiss Nelson is involved as Alexis Sanchez eventually floats a chip across goal and wide.

That Hector Bellerin goal was the cue for many fans to leave the Emirates. We are already an hour after schedule of course.

Image source, Reuters

Youngster Reiss Nelson comes on for Arsenal in place of Theo Walcott. It has been a very good second half for the hosts.

The game's not yet won as we reach the final 10 minutes. Cologne sub Milos Jojic rattles a shot straight at David Ospina.

Chance to seal it for Arsenal as Jack Wilshere plays a neat pass into the run of Alexis Sanchez - he lifts a shot wide but the flag was raised anyway.

Image source, AFP

Arsenal have been much better since the break. Alexis Sanchez hits a free-kick straight at Timo Horn in the Cologne goal.

It's been a lonely shift up front at times for Jhon Cordoba but the former Mainz man does brilliantly to run from halfway and force David Ospina into a decent save low at his near post.

Can't really argue with that as an honest assessment...

Image source, Reuters

Theo Walcott is offside again. He has made that run in behind so many times tonight.

Jack Wilshere is on for Alex Iwobi. His first appearance for the Gunners in 13 months.