And Football London's Arsenal correspondent Charles Watts wrote: "Nothing rubs salt into the wounds more than sitting next to Alex Hleb and the BATE team while they celebrate beating Arsenal by wolfing down a Double Whopper meal at 8am."
It was an historic night for Bate, who overcame Arsenal thanks to a Stanislav Dragun header on the stroke of half time, for their first win over an English side.
Alexandre Lacazette was sent off for swinging an elbow as a strong Arsenal side were stunned in Belarus at sub-zero temperatures.
The Gunners have it all to do next week week in the second leg but will still be confident of progress.
Bate Borisov players eating Burger King after beating Arsenal (Image: @charles_watts/TWITTER)
The Europa League could be Arsenal’s best route into next season’s Champions League with Manchester United in such good form in the league.
Arsenal are fifth in the Premier League and missing out on the top competition for another year could have huge financial ramifications.
They were restricted to only loan signings in January and could feel the burn of missing out on the millions of prize money again.
“We deserved to win but did not get the result. They were very organised," Emery said.
Bate Borisov beat Arsenal in the Europa League as Alexandre Lacazette was sent off (Image: REUTERS)
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"The first half was a good performance, we had chances to score. Defensively when they were 1-0 up they were organised and competitive.
"We play another 90 minutes next week and I am sure it's going to be different. Our big opportunity is next week at home, I trust in our players and in our stadium with our supporters."
Mesut Ozil was left at home in the latest snub from Emery.
"Those that were here, we can win with them and we deserved that," Emery said.
"Last week we won (at Huddersfield) and we played with the same players. We can win with every player and lose with the same players."
Arsenal arrive at Borisov Arena ahead of Europa League clash
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But Emery told Lacazette he needs to keep his cool after he was given a red card with five minutes remaining.
"I didn't see the action but we spoke and frustration needs controlling," he said.
"It's bad news with the red card. Next week we aren't going to play with him but now we are going to think with the players that are okay for next week."
Lacazette later posted an apology on Twitter, backing his team-mates to overcome the deficit without him.
"Letting the team down like that is the worst feeling," he wrote.
"I should have stayed calm but it's not always easy.. Sorry. There are still 90 minutes to play and I believe that my teammates will make it to the next round."