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Lithuanian Gediminas Vičius, representing Karagandy's "Shakhter," will face off against Scottish champions Glasgow "Celtic" in a decisive duel.
English Premier League club London's "Arsenal," who finished fourth, will clash with Istanbul's "Fenerbahce" for a place in the group stage.
Italian giant "AC Milan" will play their first match away against PSV Eindhoven, while St. Petersburg's "Zenit" will compete against "Pacos Ferreira."
Spain's defending champions, San Sebastiano "Real Sociedad," will face a tough challenge as they go up against "Lyon."
The qualifying pairs are as follows:
Bucharest's "Steaua" - Warsaw's "Legia"
"Basel" - Razgrad's "Ludogorets"
Glasgow "Celtic" - Karagandy's "Shakhter"
Plzen's "Viktoria" - "Maribor"
"Lyon" - San Sebastiano "Real Sociedad"
Gelsenkirchen's "Schalke" - Kharkiv's "Metalist"
"Pacos Ferreira" - St. Petersburg's "Zenit"
PSV Eindhoven - "AC Milan"
Istanbul's "Fenerbahce" - London's "Arsenal"
Zagreb's "Dinamo" - Vienna's "Austria