Alexis Sanchez's fine strike helped Arsenal to a 3-1 win over Cologne in Thursday night's Europa League Group H tie, after the match was delayed by an hour for crowd safety reasons
with many home fans unable to enter the turnstiles due to thousands of gathering Cologne fans outside the stadium
Those fans were celebrating first as Jhon Cordoba gave Cologne the lead after 10 minutes, superbly lofting the ball over David Ospina from 40 yards after the goalkeeper's weak clearance
Arsenal levelled after the break through Sead Kolasinac's fierce left-footed volley, just four minutes after being introduced at half-time
But Sanchez put Arsenal ahead on 67 minutes with a fine curling effort into the top corner from the edge of the box, his first goal of the season
Hector Bellerin rounded off the win (82), finishing up on the rebound from Theo Walcott's initial effort
As kick-off approached, it was clear there were many groups of visiting supporters in home sections of the ground, with reports of up to 20,000 Cologne fans in London on Thursday
Cologne, playing their first European tie in 20 years and first in this competition since 1992, have lost their opening three Bundesliga games, but took the lead in bizarre fashion early on
Theo Walcott fluffed a chance later in the first half from 12 yards, but Arsenal equalised on 49 minutes through defender Kolasinac, who rifled home a volley from the left of the box as Walcott's cross looped up from a deflection
Ospina's tame clearance from a long ball was touched forward by Leonardo Bittencourt, allowing Cordoba to take aim from 40 yards, finding the corner of the net over the hapless Arsenal goalkeeper
Sanchez, whose much-talked-about move to Manchester City broke down late in the summer window, hit a superb strike into the top corner from 20 yards with 23 minutes remaining, leaving Timo Horn helpless
Bellerin made it 3-1 late on, finding the bottom corner from an angle after Walcott's effort had been well saved by Horn
: "I believe we had a little bit of a slow start, our combinations were too slow, and we were shocked they scored
"In the second half I believe our team was better balanced better equipped going forward
 Second half was one-way traffic, just a question of time, overall I think we won it in a convincing way
"We moved to a four in the second half, Kolasinac gave us a lot going forward, and pushed Sanchez forward, he played deep in the first half
 When he had more support he looked good
"Sanchez may have stolen the headlines with a fine hit, but Spaniard Bellerin was the real class act on what could have been a hairy night for Arsenal
The hosts struggled in their three-man defence in the first half but looked far more solid after the break, with Bellerin ushering out Cologne attacks on numerous occasions, while providing a threat down the right wing
He showed his usefulness in the opposition box late on, reacting fast to score a deserved third
 They'll want him fresh for Super Sunday
Arsenal now go to Stamford Bridge to face champions Chelsea on Super Sunday, live on Sky Sports Premier League at 1
30pm, while their next Europa League clash comes away at Belarus' BATE Borisov on September 28
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