Trentino will be in Spain to meet Teruel, currently third.
Kaziyski and co will need a victory to make sure they stay top as they only have a two-point advantage on Zaksa, second.
The only team already certain to finish as leader is Cuneo who travel to Germany to meet Unterhaching, which can still grab second place.
Standings: Arkas Izmir 12, Noliko Maaseik 9, Iraklis Thessaloniki 8, Cska Sofia 1
Standings: Zenit Kazan 14, VfB Friedrichshafen 12, Euphony Asse-Lennik 3, Remat Zalau 1
Standings: Trentino PlanetWin365 13, Zaksa Kedzierzyn-Kozle 11, Cai Teruel 4, Partizan Termoelektro Beograd 2
Standings: Bre Banca Lannutti Cuneo 12, Stade Poitevin Poitiers 8, Generali Unterhaching 6, Jihostroj Ceske Budejovice 4
Standings: Lube Banca Marche Macerata 13, Lokomotiv Novosibirsk 11, Fenerbahce Instanbul 5, Hypo Tirol Innsbruck 1
Standings: Tours VB 12, Pge Skra Belchatow 11, Ach Volley Ljubljana 6, Budvanska Rivijera Budva 1
CEV Champions League – Round 6
Wednesday January 18 at 8.15pm
Cai Teruel (ESP) – Trentino PlanetWin365 (ITA)
Wednesday January 18 at 8.30pm
Bre Banca Lannutti Cuneo (ITA) – Generali Unterhaching (GER)
Wednesday January 18 at 1pm Italian time (7pm local time)
Lokomotiv Novosibrisk (RUS) – Lube Banca Marche Macerata (ITA)
2012 CEV Cup
3-0 winners in the first leg, Monza needs a win with any margin to avoid to Golden set and go through to the Cev Cup Challenge Round.
Quarter final return leg
Thursday January 19 at 7.30pm
Berlin Recycling Volleys (GER) – Acqua Paradiso Monza Brianza