Last year proved to be a poor one for English and Scottish clubs in Europe's top competition, with no team making it to the last eight - will they fare better this time around?
Which British club will fare best in the Champions League this season?
Last year proved to be a disappointing campaign for all four English clubs. Manchester City finished bottom of their difficult group after being outclassed by Real Madrid, Ajax and eventual finalists Borussia Dortmund. New manager Manuel Pellegrini will hope he can help the club finally live up to their European potential.
Manchester United, meanwhile, went crashing out in the last 16 in a controversial tie against Real Madrid. The contest hinged on Nani's debatable sending-off in the second-leg at Old Trafford, a decision which incensed the Old Trafford crowd and ended Sir Alex Ferguson's Champions League story.
This year they face a fresh challenge under new manager David Moyes, who has never taken charge of a match in the Champions League proper.
Chelsea went into last year's competition as defending champions but finished third in their group and were demoted to the Europa League. Despite winning the second-tier competition, Jose Mourinho knows that anything less than the quarter-finals this year will be deemed as a failure.
Arsenal were one goal short of that stage as they came close to knocking out eventual winners Bayern Munich. A 2-0 away win at the Allianz Arena was not enough to make up for a lacklustre first-leg performance.
They have been grouped together with Napoli, Marseille and Borussia Dortmund in what many people are describing the group of death - but now they have Mesut Ozil on their side.
Although Celtic would suggest that they have an equally difficult task. The Scottish champions face Ajax, AC Milan and Barcelona in the 'group of champions'. A win against the Catalan giants at Parkhead last year will give them confidence that it could be repeated.
HAVE YOUR SAY
Can a British side win the Champions League this year? Was last year's poor collective display a one-off or a sign that the Premier League sides have dropped their level?
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