Sevilla FC will look to save their UEFA Europa League season as they take on FC Porto in their quarter-final decider needing to overturn a 1-0 deficit from the first leg.
• Eliaquim Mangala's goal separates the two two-time winners after the first game, though the late dismissal of Fernando somewhat marred Porto's home victory.
• André Villas-Boas's Porto beat Gregorio Manzano's Sevilla on away goals in the round of 32 en route to winning the 2010/11 UEFA Europa League. Porto won 2-1 in Spain, and went through despite losing the return leg in Portugal 1-0, with Álvaro Pereira dismissed in the 72nd minute for Porto and Sevilla's Alexis shown a red card five minutes later.
• The teams for the first leg on 17 February 2011 were:
Sevilla: Palop, Fazio*, Cáceres, Navarro*, Navas, Perotti* (Capel 86), Luís Fabiano (Negredo 73), Kanouté, Sergio Sánchez, Rakitić* (Romaric 78), Medel.
Porto: Helton*, Belluschi (Álvaro Pereira 86), Moutinho, Hulk, Fucile, Rolando, Silvestre Varela* (Guarín 69), James Rodríguez (Cristian Rodríguez 59), Săpunaru, Fernando*, Otamendi.
*registered to play for club in this season's competition.
• Sevilla's record in 15 games against Portuguese sides is W7 D3 L5 (W4 D2 L2 at home). They have not won in their last two home games against Portuguese opponents, including a 1-1 draw against Estoril Praia in this season's UEFA Europa League group stage.
• Porto's record in 42 games against Spanish opponents is W14 D5 L23 (W5 D2 L13 in Spain). They have lost their last three games in Spain, failing to score in the most recent two – both in 2013.
• Sevilla are the longest survivors in this season's UEFA Europa League, having started out in the third qualifying round, but have won only one of their last four European home fixtures.
• Five of Porto's last eight European games have ended in scoring draws: two 1-1s, two 2-2s and a 3-3. They have lost only once away from home since the start of this season's UEFA Champions League group stage – 2-0 to Club Atlético de Madrid on matchday six.
• Porto have reached a quarter-final for the first time since winning the UEFA Europa League in 2010/11. Their 12 UEFA last-eight ties have ended W6 L6.
• This is Sevilla's fourth UEFA quarter-final tie; they won the last two – beating FC Zenit in 2005/06 and Tottenham Hotspur FC in 2006/07 – en route to back-to-back UEFA Cup successes. However they lost the first, against Real Madrid CF in the 1957/58 European Champion Clubs' Cup, after going down 8-0 in the first leg – their heaviest European defeat.
• Sevilla goalkeeper Beto represented Porto from 2009 to 2012, though he spent the final season on loan in Romania with CFR 1907 Cluj. He largely provided back-up for current Porto No1 Helton, making just 12 league appearances. Beto also played alongside Porto's Ricardo Quaresma (2000–01) and Silvestre Varela (2003–04) in the B team at Sporting Clube de Portugal.
• Sevilla boast more Portuguese talent in the form of defenders Daniel Carriço and Diogo Figueras; Diogo was a team-mate of Porto striker Nabil Ghilas while on loan at Moreirense FC (2012), and played alongside midfielder Josué at FC Paços de Ferreira (2011–13).
• Porto forward Silvestre Varela will make his 50th UEFA club competition appearance if he plays in Seville.
• Porto midfielder Francisco Ramos – a regular in their UEFA Youth League campaign – celebrates his 19th birthday on the day of the Sevilla game.
• Sevilla (2006, 2007) and Porto (2003, 2011) are among four previous UEFA Cup/UEFA Europa League winners in the quarter-finals along with Valencia CF (2004) and final hosts Juventus (1977, 1990, 1993). Porto (2011) are the only quarter-finalists to have won the UEFA Europa League in its current guise.
• There are three domestic champions remaining in the competition: Porto, Juventus and FC Basel 1893.
• The UEFA Europa League's two most successful member associations this season, Spain and Portugal, boast two surviving clubs apiece, with Italy, Netherlands, Switzerland and France taking one club through.
• All the four surviving teams that crossed over from the UEFA Champions League round of 32 – Juventus, SL Benfica, Basel and Porto – are yet to lose in their five games.
• Sevilla have received the most yellow cards (28) in this season's competiton, and have also won the most corners since the start of the group stage – 68 in total – and had the most shots on (60) and off target (60) of any of the sides left in the competition.
• Valencia's Paco Alcácer and Sevilla's Kevin Gameiro are the highest scoring players left in the competition, with four goals each since the start of the group stage – four fewer than the overall top scorer, FC Salzburg's Jonatan Soriano.
• Sevilla coach since January 2013, Unai Emery started out as a midfielder at Real Sociedad de Fútbol, but spent the bulk of his career in Spain's second division, switching from playing to coaching at Lorca Deportiva CF after a serious knee injury. Having led UD Almería to the top tier he coached Valencia CF from 2008 to 2012, with his side regular European contenders during that spell. More recently he had a brief stint at FC Spartak Moskva.
• Porto dismissed coach Paulo Fonseca on 5 March following a run of four games without a win in all competitions. B-team manager Luís Castro has been placed in command for the remainder of the season.
• Luís Castro was a defender, most notably for UD Leiria and Vitória SC, and had gained a degree in physics by the time he moved from the pitch into the dugout with RD Águeda. He led a number of smaller clubs before taking charge of FC Penafiel, leaving following their relegation from the Liga in 2006. After that, he was in charge of Porto's youth division for a number of years before returning to pitchside with their reserve team in 2013.
• Sevilla became the first team to win a UEFA Europa League penalty shoot-out away from home when they defeated local rivals Real Betis Balompié in the round of 16. The competition's previous two shoot-outs had been won at home by FC Steaua Bucureşti (2011/12) and FC Basel 1893 (2012/13). Sevilla also became only the second club to win a UEFA Europa League knockout tie after losing the first leg at home.
• Sevilla's record in four UEFA club competition penalty shoot-outs is W3 D1:
4-3 (away) v Real Betis Balompié, 2013/14 UEFA Europa League round of 16
2-3 (home) v Fenerbahçe SK, 2007/08 UEFA Champions League round of 16
3-1 (neutral) v RCD Espanyol. 2006/07 UEFA Europa League final
4-3 (away) v PAOK FC, 1990/91 UEFA Cup first round
• Porto's record in three UEFA shoot-outs is W1 L2:
1-4 (home) v FC Schalke 04, 2007/08 UEFA Champions League round of 16
3-4 (home) v UC Sampdoria, 1994/95 UEFA Cup Winners' Cup quarter-finals
8-7 (neutral) v Once Caldas, 2004 European/South American Cup
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