Beşiktaş JK (TUR) v Arsenal FC (ENG) – 19/27 August
• Demba Ba, who scored a hat-trick on his first Beşiktaş start on Tuesday, struck twice against Arsenal on 29 December 2012 – when Newcastle United FC lost 7-3 in his last game before joining Chelsea FC.
• Last season Arsenal knocked out Istanbul club Fenerbahçe SK 5-0 on aggregate in the play-offs.
R. Standard de Liège (BEL) v FC Zenit (RUS) – 20/26 August
• Axel Witsel of Zenit started his senior career with Standard.
• Zenit beat Standard 4-1 on aggregate in the 2007/08 UEFA Cup first round on their way to winning the competition.
FC København (DEN) v Bayer 04 Leverkusen (GER) – 19/27 August
• FCK have not won in eight meetings with German opposition – all in the UEFA Cup or UEFA Europa League.
• Leverkusen will kick off Germany's bid to provide at least one finalist in the 6 June decider at Berlin's Olympiastadion.
LOSC Lille (FRA) v FC Porto (POR) – 20/26 August
• The LOSC squad includes on-loan Manchester City FC forward Marcos Lopes – whose maiden European campaign was ended by old club SL Benfica in last season's UEFA Youth League quarter-finals.
• Porto will hope to take an omen from when the final was last in Germany ten years ago: they overcame France's AS Monaco FC 3-0 to lift the trophy for the second time.
SSC Napoli (ITA) v Athletic Club (ESP) – 19/27 August
• Napoli coach Rafael Benítez is familiar with the Basque Country and its surroundings, having coached CA Osasuna in 1996/97.
• Athletic are aiming for their second group stage campaign, 16 years after the first.
NK Maribor (SVN) v Celtic FC (SCO) – 20/26 August
• Maribor knocked out Rangers FC in the 2011/12 UEFA Europa League play-offs.
• Celtic have never faced Slovenian opposition.
FC Salzburg (AUT) v Malmö FF (SWE) – 19/27 August
• Salzburg have happy memories of their first encounters with Swedish opposition, defeating IF Elfsborg 4-0 at home and 1-0 away in last term's UEFA Europa League group stage.
• Malmö may never have played in the group stage but they famously reached the European Cup final – in a German arena named the Olympiastadion – in 1979.
Aalborg BK (DEN) v APOEL FC (CYP) – 20/26 August
• AaB are the lowest-ranked team left in the competition, 249th in the UEFA coefficients, yet have twice played in the group stage.
• APOEL earned their first group qualification in 2009/10 by beating Denmark's FCK 3-2 on aggregate in the play-offs, despite losing the first leg 1-0 in Copenhagen.
FC Steaua Bucureşti (ROU) v PFC Ludogorets Razgrad (BUL) – 19/27 August
• Steaua's last three European ties with Bulgarian opposition were against PFC CSKA Sofia – the Romanian side going through on each occasion.
• Ludogorets have never faced Romanian opposition.
ŠK Slovan Bratislava (SVK) v FC BATE Borisov (BLR) – 20/26 August
• This will be Slovan's first game against a Belarusian team – and BATE's maiden meeting with a Slovak club.
• BATE are targeting a fourth group qualification in seven seasons.
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