Arsenal will face Swedish side Ostersunds in the Europa League round of 32, while Celtic face Russian side Zenit St Petersburg.
IwobiThe Gunners, seeded for the draw, avoided the likes of Borussia Dortmund and Napoli – who were both in the unseeded pot.
Ostersunds are managed by Englishman Graham Potter, who previously played for Birmingham City and West Brom.
Potter has taken the club from the fourth division to the Allsvenskan, the Swedish top tier, in six years.
The 42-year-old has earned comparisons with Roy Hodgson – who managed in Scandinavia – and this will be his first clash against English opposition.
Arsenal will play the first leg away in Ostersund in mid-February, before returning to the Emirates.
Celtic, also unseeded, will play the first leg of their tie against Zenit at home, before a trip to the Zenit Arena in Russia, which is one of the 2018 World Cup venues in Russia.
Iwobi’s Arsenal face Ostersunds in Europa League
