Arsenal missed out on Champions League qualification last season, but goalscorer Bellerin hinted they will hope to emulate Manchester United by winning the Europa League to secure a return to the top table.
Wenger said he was expecting the contest to be postponed but said he was unsure if the confusion was to blame for his side's poor start.
Iwobi, who has struggled for game time this season, played in central midfield and was replaced by Jack Wilshere in the 69th minute. "It was just a question of time, overall I think we won it in a convincing way".
Scuffles broke out inside the ground as it emerged Cologne fans had gained access to home sections once gates were opened, with Metropolitan Police deploying additional officers and dogs to the stadium in response. "Past year it didn't work out against Liverpool and Arsenal, but this season we have already won at Tottenham", Courtois said.
Arsenal will be investigating, however, to understand how the situation arose and what they can learn from the situation going forward.
Daesh Targets Karbala Pilgrims, 50 Killed
The death toll had risen to 50 people, with more than 80 wounded, a health official and police sources said. The attack occurred as Iraqi forces battled to defeat ISIS terrorists in areas under their control.
"They were very clever, " he added.
Arsenal have promised a "full review" into disorder at The Emirates last night after 20,000 FK Koln fans descended on the stadium for their team's Europa League game. I don't know if it was mental, or the fact they scored the goal and we didn't know how to deal with it.
A statement said: "At around 3pm on Thursday, September 14 a large group of football fans gathered in Oxford Street". They now rank dead last through three games, with just one goal scored and a huge seven surrendered.
"It's a good test because it's a European competition, although we do want to play in the Champions League".
The French coach believes a change in formation gave Alexis Sanchez more freedom to play higher up the pitch as he felt the Chilean was playing too deep in the first-half.