Joel Campbell says Wednesday’s Matchday Six showdown with Olympiacos will be like a ‘cup final’ for Arsenal.

The Gunners travel to Athens knowing they must win by two clear goals or secure a victory scoring at least three goals if they’re to qualify from Group F at the expense of their hosts.

Speaking after Saturday’s win against Sunderland, Campbell – who spent the 2013/14 season on loan at Olympiacos – told Arsenal.com that his teammates will need to produce their best form to secure safe passage to the knockout rounds.

“We have to prepare mentally and physically for Wednesday’s game because it will be very difficult.

“We already played against Olympiacos at Emirates Stadium. They are a great team, a great rival and especially because they play at home.

“In the Pireo (Karaiskakis Stadium) it is very difficult to get points but it is the last game of the group stage and we will give our best.

“It is the most important game of the season so far. It will be a cup final and we have to win to continue in the Champions League.”

To underline the challenge we face on Wednesday it’s worth remembering that Arsene Wenger’s men have been beaten in their three previous visits to the Karaiskakis Stadium.

It’s not just us that’s suffered in Athens, Olympiacos take great pride in their home form in Europe. Last year the Greeks beat finalists Juventus at home and in over the past decade they’ve also recorded memorable wins over Real Madrid, Borussia Dortmund, Manchester United (against whom Campbell played and scored), Benfica and Atletico Madrid.

Also we’re wearing our terrible third shirt.