Arsenal and Standard in training - pictures
Arsenal and Standard Liege put the finishing touches to their big-match preparations on Monday.
Arsene Wenger put his players through their paces at the training ground at London Colney while Standard got an early feel for the Emirates Stadium pitch.
Our official club photographers were at the London Colney session to bring you these exclusive images. The pictures from Emirates Stadium are © pa photos.
Arsenal have advanced for 10 consecutive years in Europe