Arsenal drew 0-0 against Turkish side Besiktas in their opening Champions League fixture.
The Gunners ended the game with ten men after Aaron Ramsey was sent off.
They nearly stole it when Oxlade-Chamberlain hit the woodwork in the closing minutes.
The pick of the other matches was in Denmark.
South Korean Heung-Min Son struck the winner for Bayer Leverkusen as the German side beat FC Copenhagen 3-2 – all the goals coming in the first half.
Athletico Bilbao on the road at Napoli took the lead just before half time thanks to their Basque winger Iker Muniain. Argentine Gonzalo Higuain saved the blushes for the home side with the equaliser. It finished 1-1.
Salzburg went ahead at home against Malmo just past the quarter hour mark with a Franz Schiemer goal. Spanish striker Jonathan Soriano got the winner in their 2-1 victory short of the hour mark.
It was goaless in the final game of Tuesday night when Steau Bucharest met Bulgarian side PFC Ludogrets Razgrad.
Pick of the matches on Wednesday night is when Scottish champions Celtic travel to Slovenia for their game against NK Maribor after being re-instated in the competition.
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