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Italian side Atalanta host Premier League side Arsenal in Bergamo.

Watch the best of the action as French side Monaco host Spanish giants Barcelona.

German champions Bayer Leverkusen take on Dutch side Feyenoord in Rotterdam.

Watch the best of the action as Spanish side Atletico Madrid host German club RB Leipzig.

Highlights as Serbian champions Red Star Belgrade take on Portuguese club Benfica.

Watch the best of the action as French side Brest host Austrian champions Sturm Graz.

Highlights as the UEFA Champions League gets under way.

Scottish champions Celtic host Slovakia's Slovan Bratislava in Glasgow.

The champions of England take on the champions of Italy in a re-match of the 2023 final.

Last season's finalists Borussia Dortmund take on Club Brugge in Belgium.

Watch the best of the action as French champions PSG take on Spanish side Girona in Paris.

Champions League debutants Bologna host Ukrainian side Shakhtar Donetsk.

Liverpool travel to Milan's San Siro for a re-match of the 2005 and 2007 finals.

German giants Bayern Munich host Croatian champions Dinamo Zagreb.

Aston Villa return to Europe's top-tier competition with a trip to Swiss side Young Boys.

Defending European champions Real Madrid welcome German side Stuttgart to the Bernabeu.

Dutch side PSV travel to Turin to take on two-time European champions Juventus.

Portugal's Sporting host French side Lille in Lisbon.