FC Copenhagen v Chelsea key battles
Mikael Antonsson v Fernando Torres
The most experienced of Copenhagen's central defenders, Antonsson has little reason to fear Torres, having faced an in-form Lionel Messi twice during the group stages. He was unable to prevent the Barcelona star netting three times in those two matches but helped his side to a 1-1 draw at home. Torres flopped in his first two games for Chelsea but is too good not to rediscover form eventually. He will also be fresh having been ineligible for Saturday's shock FA Cup defeat to Everton.
Jesper Gronkjaer v Paulo Ferreira
Gronkjaer will forever be remembered by Chelsea fans for scoring the goal that gained the club a place in the 2003-04 Champions League, which had a huge impact on Roman Abramovich's subsequent takeover. The winger, now a veteran, lasted just one more season at Stamford Bridge and will be keen to put one over his former side. Right-back has been a real problem position for Chelsea this season, with Ferreira and Jose Bosingwa failing to make it their own. With David Luiz's arrival freeing Branislav Ivanovic to play there in the Barclays Premier League, Ferreira needs a strong performance in Copenhagen.
Dame N'Doye v John Terry
Senegal striker N'Doye has been prolific since joining Copenhagen two years ago and has 13 goals in just 18 appearances this season. The 25-year-old has formed a lethal partnership with Cesar Santin and it remains to be seen whether the duo are unleashed on Chelsea, with Copenhagen having adopted a more cautious approach in the Champions League. Terry has been identified by Blues boss Carlo Ancelotti as one of only two outfield players currently at the top of their game at Stamford Bridge. The club captain needs to maintain that form to ensure a shock is not on the cards in Denmark.