Greek authorities say two Chelsea fans were injured in an attack by suspected local fans ahead of a Europa League match at PAOK.
Unai Emery confirmed Bernd Leno will start ahead of Petr Cech for Arsenal's Europa League opener, saying the club need to "improve both goalkeepers in our style".
Bernd Leno and Lucas Torreira are in line for their first Arsenal starts as the Gunners host Vorskla Poltava in Thursday's Europa League opener.
Eden Hazard is not part of the Chelsea squad travelling to Greece to play PAOK in the Europa League on Thursday.
Chelsea boss Maurizio Sarri says Ruben Loftus-Cheek will get a chance in the future.
Eden Hazard has not travelled with Chelsea to Greece where they will get their Europa League campaign underway against PAOK.
Steven Gerrard says Rangers will be "underdogs" in the Europa League but have the talent to upset some of the big clubs.
Will Arsenal, Chelsea, Celtic and Rangers all make winning starts in the Europa League group stage? Charlie Nicholas gives his predictions.
Steven Gerrard says he is focused on winning Rangers' Europa League group stage opener when they take on Villarreal on Thursday.
Brendan Rodgers reiterated his excitement for European football ahead of Celtic's Europa League opener at home to Rosenborg.
Unai Emery insists he respects Ivan Gazidis' decision to quit as Arsenal chief executive just three months after recruiting him as manager.
Stephan Lichtsteiner is desperate for Champions League football and believes Arsenal have the talent to get back into Europe's top tier again next season.
Brendan Rodgers insists he is not disappointed Celtic are in the Europa League, saying the Hoops do not "deserve" Champions League football.
A third UEFA club competition is set to be introduced from the 2021-22 season, says the head of the association representing Europe's biggest clubs.
Arsenal and Chelsea have discovered their Europa League group stage fates - so who are Vorskla and Vidi?
Arsenal and Chelsea both face long-distance trips in the Europa League after the group stages were drawn on Friday.
The organisation that represents Europe's 32 leagues has reacted angrily at the prospect of a third European club competition.
Arsenal, Chelsea, Celtic and Rangers learn who they will face in the group stages of the Europa League.
Rangers face tough trips to Russia and Spain in this season's Europa League, while Celtic again face Rosenborg.
Unai Emery is confident Arsenal can make a big impact in the Europa League, despite the long distances they must travel for away games.
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