Arsenal won't beat Olympiacos! Keeper Roberto convinced Arsene Wenger's men won't get Champions League win in Athens

Olympiacos goalkeeper Roberto has warned Arsenal about underestimating his side and claimed that they'll complete a Champions League double over their Group F rivals.

The Gunners have to beat the Greek outfit in Athens by two clear goals or better the 3-2 scoreline from the first clash if they want to qualify for the knockout stages.

Ahead of the vital game, Roberto says that home comforts gives them an edge over the Premier League side.

Olympiacos goalkeeper Roberto is confident his side can upset the odds and beat Arsenal

Olympiacos goalkeeper Roberto is confident his side can upset the odds and beat Arsenal

The Spaniard featured when the Greek side shocked the Gunners at the Emirates Stadium 

The Spaniard featured when the Greek side shocked the Gunners at the Emirates Stadium 

David Ospina's howler cost Arsenal dear as they fell to a disappointing defeat in the first meeting 

David Ospina's howler cost Arsenal dear as they fell to a disappointing defeat in the first meeting 

'We are at home and that's a big advantage for us. I think that gives us a bigger chance and is vital for us,' he said.

'No one really gave us much hope of getting through, no one believed in us and now we can do it.

Arsene Wenger's men need to win by two clear goals or better the 3-2 scoreline from the first clash

Arsene Wenger's men need to win by two clear goals or better the 3-2 scoreline from the first clash

'Our victory in London was a warning to everyone. It wasn't lucky, we deserved it, and it raised our confidence. We are convinced that Arsenal won't win in Athens.

'The atmosphere will be tough and intense. If we play a good match then that is more important.'

Santi Cazorla and Alexis Sanchez are notable absentees but Arsene Wenger does have Aaron Ramsey, Theo Walcott and Alex Oxlade-Chamberlain available.

The Arsenal stars have been busy preparing for the crucial clash at their London Colney training ground

The Arsenal stars have been busy preparing for the crucial clash at their London Colney training ground

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