The game at Emirates Stadium was delayed by an over after huge numbers of Koln entered the home section of the stadium, and got involved in skirmishes with the stewards.
"We waited patiently in our dressing room," said Wenger after the 3-1 win for his side. "But it was difficult for me, I had all kinds of plans to think about at some stage. Do we play tomorrow, what time do we want to play, do we play next week?
"They had the Bundesliga game next week, we had a league cup game next week, do we move it to Tuesday and play Thursday?
"All kinds of situations we had to analyse. At some stage I thought they will not play the game, because I can't see the police taking any risk.
"We live in a 100 per cent security society and I thought they would not take a gamble to play this game. But I must say our supporters dealt well with the situation and there was no aggravation. I hope everything goes well after the game."