Champions Chelsea in need of old resilience

With two matches to play former champions Manchester United and Porto and impressive newcomers Malaga are the only teams mathematically certain of qualifying, although the make up of the first knockout round will become clearer this week.

UEFA use a complicated head-to-head and mini-league tiebreak system to work out the final rankings instead of goal difference, meaning uncertainties about who qualifies can last until the final kick of the final match.

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