Chelsea FC will look to overturn a 1-0 UEFA Europa League round of 16 deficit against FC Steaua Bucureşti, with the European champions bidding to complete a clean sweep of major UEFA club trophies.
• Raul Rusescu's first-half penalty put the 2012 UEFA Champions League winners on the back foot in the first leg.
• The sides met for the first time in Bucharest. Chelsea's only previous encounters with Romanian opposition came in the 2008/09 UEFA Champions League group stage, where they drew 0-0 away then won 2-1 at home against CFR 1907 Cluj.
• Steaua's 15 matches against English clubs have ended W5 D4 L6 (W0 D2 L5 in England). They are on a four-game losing streak in England.
• Steaua's most successful recent European campaign ended in England in dramatic circumstances; leading 1-0 from the first leg of their 2005/06 UEFA Cup semi-final tie against Middlesbrough FC, and 3-0 up overall after 24 minutes of the return, they were then heading through on away goals until Massimo Maccarone struck after 89 minutes at the Riverside Stadium to secure a 4-2 home win – and a 4-3 aggregate success – for Steve McClaren's side.
• Steaua's success against AFC Ajax in the round of 32 was the first knockout tie since the advent of the UEFA Europa League to be decided on penalties, Iasmin Latovlevici scoring the winner in a 4-2 spot-kick success.
• Steaua were the only team in the round of 32 to go through to the last 16 after losing the first leg. It was only the second time in the UEFA Europa League that a side had recovered from a two-goal first-leg deficit to qualify, after Fulham FC's comeback from a 1-3 away reverse to win 4-1 at home against Juventus in the 2009/10 round of 32.
• Chelsea and Levante UD have played fewer UEFA Cup/UEFA Europa League games than any other side left in the competition – just 11 each. This is the first time either have played in the last 16 of this competition.
• Chelsea could become the first side to win UEFA's two top club competitions in reverse order in successive seasons.
• They could also become only the fourth side to lift all three of UEFA's major club competitions after Juventus, AFC Ajax and FC Bayern München. Chelsea won the European Cup Winners' Cup in 1970/71 and 1997/98 and the UEFA Champions League last season.
• Chelsea midfielder Marko Marin turns 24 on the eve of the game.
• Steaua's Stefan Nikolić (2006-08) and Chelsea's Branislav Ivanović (2004-06) are both former OFK Beograd players.
• The round of 16 features teams from 11 UEFA member associations; eight nations have a single representative, with England and Russia both taking three teams through and Italy two.
• Chelsea's next goal will be their 300th in UEFA competition.
• Thanks to extra time against Ajax, Steaua goalkeeper Ciprian Tătăruşanu and defender Vlad Chiricheş have played more minutes in this season's UEFA Europa League than anyone else in this season's competition – 840 in total.
• Chelsea fielded two notable Romanian players in the past: striker Adrian Mutu (2003-04) and midfielder Dan Petrescu (1995-2000). The first foreign player to register over 100 appearances for the Blues, Petrescu started his career with Steaua – reaching the 1989 European Cup final – and won the 1998 UEFA Cup Winners' Cup with Chelsea, although he was sent off in the final.
• Rafael Benítez moved into coaching young after injury ended his career as a midfielder, taking charge of youth and reserve teams at Real Madrid CF. He led Valencia CF to two league titles and the 2003/04 UEFA Cup, and then won the 2004/05 UEFA Champions League with Liverpool FC. He coached FC Internazionale Milano briefly in 2010/11 and replaced Roberto Di Matteo as Chelsea manager in November 2012.
• Benítez's most recent UEFA Europa League experience came in 2009/10, when he led Liverpool to the semi-finals before defeat by eventual winners Club Atlético de Madrid.
• Benítez has been in charge of 133 UEFA club competition games – more than any other coach in this season's round of 16.
• A right-sided midfielder, Laurenţiu Reghecampf was capped once by Romania and played for Steaua from 1996 to 2000, finishing his career in Germany with FC Energie Cottbus, Alemannia Aachen and 1. FC Kaiserslautern. Since taking up coaching in 2009, he has had eight jobs; he has been in charge of FC Snagov three times, FC Universitatea Craiova twice and CF Gloria 1922 Bistriţa and FC Concordia Chiajna once each, taking command at Steaua last summer.
• Chelsea's UEFA competition shoot-out record is:
4-3 v FC Bayern München, 2011/12 UEFA Champions League final
5-6 v Manchester United FC, 2007/08 UEFA Champions League final
1-4 v Liverpool FC, 2006/07 UEFA Champions League semi-final
• Steaua's record is:
4-2 v AFC Ajax, 2012/13 UEFA Europa League round of 32
4-3 v Grasshopper Club, 2010/11 UEFA Champions League play-off
4-3 v Valencia CF, 2004/05 UEFA Cup round of 32
2-0 v FC Barcelona, 1985/86 European Champion Clubs' Cup final
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