Arsenal travel to Switzerland on Tuesday determined to overcome the bottom club of group A, FC Basel, to have any chance of claiming a place in the prised pot for the Round of 16 draw.
Arsene Wenger's side have been in fantastic domestic form this season, losing just once since the opening day of the campaign, but need to transition those performances to the European scene - which has been a real cause of frustration for Gunners supporters in recent years.
To achieve success in Europe's premier competition on a consistent basis, Wenger must start overcoming the weaker teams in their Champions League groups - starting with Basel.
Beating the Swiss club must remain a priority for Wenger this week, despite his Arsenal side facing a relatively tough Premier League fixture next weekend - with Stoke City due to visit the Emirates Stadium.
Defeat to the Potters could have a significant impact on their title hopes, but the north Londoners must prioritise Tuesday's game instead. Here's three reasons why.
Attempt to claim top spot
In seasons gone by, Arsenal have struggled to capture the top spot in their Champions League group and resultantly been forced to take on Barcelona and Bayern Munich in the Round of 16.
Tuesday's clash with Basel is unlikely to have any impact on proceedings in Paris, as PSG take on Ludogorets needing a victory to guarantee top spot in the group.
Regardless of the improbability, Arsene Wenger must set up his side capable of achieving victory, so any slip up in Paris is capitalised upon by the Gunners.
To continue their impressive form
Since losing to Liverpool on the opening day of the season, Arsenal have suffered just one defeat in twenty-two games this season - a 2-0 loss to Southampton in the EFL Cup last Wednesday.
In Switzerland, Wenger must try to demolish the Swiss champions as a second loss in the space of a week could deter the momentum the Gunners have built up in recent months.
The importance momentum has on a team cannot be overstated, and Wenger must ensure his team is set up accordingly to overcome his Swiss rivals.
Reward the fans' loyalty
Regardless of the opponent, the competition or the current state of the team, the supporters travelling to matches are deserving to see their side attempt to win a football match.
Many fans will make the journey to Switzerland having to take a considerable amount of time off work and spend a small fortune on tickets and travel.
Wenger and his team owe a performance to the travelling fans coming to support their beloved Gunners midweek, playing in the most expensive country in Europe.