Arsenal attacker Joel Campbell has said that the Gunners will give their best as they face a difficult task of qualifying for the second round of the UEFA Champions League.
Arsene Wenger’s men face Olympiacos in their final group game, and a win with at least a two goal margin will ensure they qualify ahead of the Greek club.
A 3-2 win will also ensure Arsenal qualify on goal difference after losing the first leg in London by the same scoreline.
However, Campbell hailed the Gunners' 3-1 win over Sunderland at the weekend, ahead of their vital Champions League clash on Wednesday night.
"[The win over Sunderland] was a good result for the team,” he said, Arsenal.com reported. “We got the result and that's what we wanted. Now 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.”