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A rare UEFA Champions League home defeat in the round of 16 sent Chelsea FC tumbling out of last season's competition so the London club have extra motivation to gain a positive result against FC København.
• Carlo Ancelotti's team hold the upper hand in the tie having run out 2-0 winners in Copenhagen on 22 February, Nicolas Anelka scoring in each half (17, 54).
• Chelsea are in the last 16 for the eighth successive season and in five of the last seven campaigns have gone on to reach the semi-finals or better, although in 2009/10 they lost 1-0 at home to FC Internazionale Milano at this stage to bow out 3-1 on aggregate. In contrast, the Danish champions are appearing at this stage for the first time.
• Before the first leg the teams had only met on one previous occasion, in the 1998/99 UEFA Cup Winners' Cup second round, Chelsea winning the decisive second leg in Copenhagen with a single goal from legendary Danish striker Brian Laudrup. It was his only goal for the London club in the final game of his brief stay, Laudrup moving back to his homeland to join FCK in 1999, scoring twice in 12 league appearances.
• The Stamford Bridge leg of that UEFA Cup Winners' Cup tie had ended 1-1, Marcel Desailly equalising with just a minute remaining to cancel out Bjarne Goldbæk's 81st-minute opener. The Danish midfielder took the opposite path to Laudrup when he moved to Chelsea shortly after the tie and scored five times in 29 league appearances before joining Fulham FC in 2000.
• While those matches are Chelsea's only experience of Danish opposition, FCK's four other fixtures against English teams have brought one win, a draw and two defeats – both reverses coming away from home. The Copenhagan club lost 3-0 at Manchester United FC in the 2006/07 UEFA Champions League group stage and 2-1 at Manchester City FC in the 2008/09 UEFA Cup round of 32.
• A 1-0 defeat at Olympique de Marseille on Matchday 6 ended Chelsea's ambition of becoming only the fifth team to win all six games in a UEFA Champions League group. At home in Group F they beat Marseille (2-0), FC Spartak Moskva (4-1) and MŠK Žilina (2-1), finishing as group winners for the sixth time in eight seasons.
• Before their defeat at home to José Mourinho's Inter at this stage last season, the London club were unbeaten in 21 home UEFA Champions League games, including 15 victories.
• Last season was the third successive campaign Chelsea had lost to the eventual winners and the first time they had missed out on the semi-finals since 2005/06.
• København's group campaign was in stark contrast to their only previous participation in 2006/07 when they finished bottom of their section. Away from home this time they won 2-0 at Panathinaikos FC but lost 2-0 to FC Barcelona and 1-0 at FC Rubin Kazan. In their qualifying games, FCK drew 0-0 at FC BATE Borisov and lost 2-1 at Rosenborg BK.
• Chelsea have won the tie on all six occasions they have recorded a first-leg away victory in UEFA competition, most recently against Liverpool FC in the 2008/09 UEFA Champions League quarter-finals (3-1 away, 4-4 home). Their sole 2-0 first-leg win on their travels came at Žilina in the third qualifying round of the 2003/04 competition, preceding a 3-0 Chelsea triumph at Stamford Bridge.
• Worryingly for FCK, only once in UEFA Champions League history has a side recovered from losing the first leg at home to win the tie, AFC Ajax overturning a 1-0 loss against Panathinaikos FC in the 1995/96 semi-finals with a 3-0 away success.
• FCK have lost the first leg at home in UEFA competition on eight previous occasions and lost seven of those ties, most recently going down 3-1 home and away to Olympique de Marseille in last season's UEFA Europa League round of 32. Their sole win came in the 1994/95 UEFA Cup preliminary round against FC Jazz (0-1 home, 4-0 away), while on the only occasion they lost 2-0 in the first leg at home, against Torino Calcio in the 1991/92 UEFA Cup quarter-finals, they went down 1-0 away.
• The Danish champions have been involved in only one shoot-out in UEFA competition, defeating Ferencvárosi TC 3-2 in the 2003/04 UEFA Cup first round.
• Chelsea have lost both their previous shoot-outs, going down 4-1 to Liverpool in the 2006/07 UEFA Champions League semi-finals – Frank Lampard converting their only successful kick – and 6-5 against Manchester United FC in the 2008 final in Moscow. Lampard, Ashley Cole and Salomon Kalou were all on target with John Terry and Anelka failing from the spot.
• Jesper Grønkjær was a Chelsea player between 2000 and 2004, scoring one of their goals in a 5-3 aggregate defeat by AS Monaco FC in the 2003/04 UEFA Champions League semi-final. He scored seven times in 87 Premier League games.
• Grønkjær and Cole were on opposite sides at the FIFA 2002 World Cup when England beat Denmark 3-0 in the round of 16 in Nigata.
• FCK coach Ståle Solbakken had a brief spell in England with Wimbledon FC in 1997/98. One of his six league appearances was a 1-1 draw at Stamford Bridge on 26 December, while his sole goal came in a 2-1 home defeat against a West Ham United FC team that included Frank Lampard.
• Branislav Ivanović was in the FC Lokomotiv Moskva side beaten 1-0 at home by FCK in the UEFA Cup group stage on 29 November 2007.
• Zdeněk Pospěch and Petr Čech are team-mates with the Czech Republic national team.
• On 9 February a Denmark team including Mathias Zanka Jørgensen, William Kvist and Martin Vingaard were beaten 2-1 at home by England in a friendly international at FCK's Parken Stadion. Captain Lampard, Cole and Terry appeared for the visitors.
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