Gladbach are playing in the Champions League group stage for the first time, having finished third in the Bundesliga last season, but they made a dismal start to the current campaign.
However, the focus is now back on Champions League football and the upcoming clash with Olympiakos is crucial if the Gunners want to qualify for the knockout stages, after they lost their opening match against Dinamo Zagreb.
A huge morale boost for Wenger will be the offensive efficiency and clinical finishing Arsenal demonstrated at Leicester which means it is unlikely that the Gunners boss will make as many alterations to his side as he did in Zagreb.
Juve, Serie A winners for the past four years and last season’s Champions League runners-up, have made a poor start to the new campaign after a summer of upheaval.
City and Juventus, who lost to Barcelona in last season’s final, are joined in Group D by Borussia Moenchengladbach and Europa League champions Sevilla.
Their overall record from 20 away matches against Serie A sides is six wins, eight draws and six losses. “We know it’s not going to be easy”, Roma’s Juan Manuel Iturbe tells his club’s news site this week.
Arsenal manager Arsene Wenger is confident his side can soon recover from another Champions League away performance to forget after seeing striker Olivier Giroud sent off in a 2-1 defeat at Dinamo Zagreb.
Bayern’s Robert Lewandowski, right, celebrates with teammate Douglas Costa after scoring during the German Bundesliga soccer match between FC Bayern Munich and VfL Wolfsburg at the Allianz Arena stadium in Munich, Germany, Tuesday, September 22, 2015.