Real Madrid CF and Borussia Dortmund met four times last term and the German side won both home games though they need something special to retrieve 3-0 first-leg arrears.
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Real Madrid CF lost twice at Borussia Dortmund last season and make a quick return to Germany to complete their UEFA Champions League quarter-final – although it will take a remarkable turnaround to prevent them reaching a fourth successive semi-final.
• The nine-time European champions won 3-0 in the first leg at the Santiago Bernabéu, meaning they could even afford a repeat of last year's 4-1 defeat at Dortmund and still progress. Cristiano Ronaldo's first-leg goal took his personal tally to 14, matching the record for a European Cup season jointly held by José Altafini (1962/63) and Lionel Messi (2011/12).
• The sides met four times in 2012/13, Dortmund winning 2-1 at home in the group stage as Robert Lewandowski and Marcel Schmelzer scored either side of Ronaldo's strike. It finished 2-2 in Spain, Dortmund twice leading through Marco Reus and Álvaro Arbeloa's own goal with Pepe and Mesut Özil responding, although it was the German team who topped the group, three points above their Spanish rivals.
• The clubs were reunited in the semi-finals and again Dortmund prevailed, Lewandowski scoring all four goals – a European Cup semi-final first – in a 4-1 first-leg triumph in Germany. Late goals from Karim Benzema (83) and Sergio Ramos (88) set up a frenzied finish to the return match, but Dortmund held on, although they went on to lose the Wembley final to FC Bayern München 2-1.
• The full lineups for the semi-final opener at the BVB Stadion on 24 April 2013 were:
Dortmund: Weidenfeller, Piszczek (Grosskreutz 83), Subotić, Hummels, Schmelzer, Błaszczykowski (Kehl 82), Bender, Gündoğan (Schieber 90), Götze, Reus, Lewandowski.
Madrid: López, Pepe, Varane, Ramos, Coentrão, Alonso (Kaká 80), Khedira, Modrić (Di Maria 68), Ronaldo, Özil, Higuaín (Benzema 68).
• Carlo Ancelotti's charges can look for inspiration to the 1997/98 semi-final when a 0-0 draw in Dortmund, after Fernando Morientes and Christian Karembeu had registered first-leg goals in the Spanish capital, gave Madrid a 2-0 aggregate success on their way to collecting the trophy.
• The full lineups in Dortmund on 15 April 1998 were:
Dortmund: Klos, Heinrich, Binz, Kree (Zorc 12), Reuter, Möller, But, Tanko (Decheiver 71), Ricken (Timm 76), Chapuisat, Feiersinger.
Madrid: Illgner, Panucci, Hierro, Sanz, Roberto Carlos, Karembeu, Redondo, Seedorf (Guti 88), Amavisca, Raúl (Jaime 74), Morientes (Víctor 88).
• Current Dortmund sporting director Michael Zorc and youth team coordinator Lars Ricken featured in both games for Nevio Scala's side.
• The clubs also came together in the 2002/03 second group stage when the Dortmund fixture ended 1-1, Javier Portillo's added-time effort cancelling out Jan Koller's first-half goal. A week earlier Madrid had won 2-1 at home, Koller again on target with Raúl González and Ronaldo replying. Madrid qualified in second place, one point above Dortmund.
• From those 2002/03 fixtures, Sebastian Kehl and then reserve keeper Roman Weidenfeller are still at Dortmund and Iker Casillas remains at Madrid.
• Dortmund progressed to their second straight quarter-final with a 5-4 aggregate victory over FC Zenit, winning 4-2 away and holding on despite a 2-1 home loss. That home defeat was their second of this UEFA Champions League campaign, following a 1-0 reverse to Arsenal FC in the group stage, although they did beat Olympique de Marseille and SSC Napoli at the BVB Stadion Dortmund.
• In last season's quarter-final, Dortmund triumphed 3-2 at home to Málaga CF after a goalless first leg. Isco, scorer of Madrid's second in the first leg this time around, played both matches for the Liga outfit.
• Dortmund's record against Spanish visitors is W6 D3 L2; their record in two-legged ties with Spanish teams reads W5 L2.
• Madrid, nine-time European Cup winners, are in the last eight for a fourth consecutive campaign. They have lost in the semi-finals in each of the past three seasons.
• In last year's quarter-final Madrid beat Galatasaray AŞ 3-0 at home; a subsequent 3-2 away defeat could not prevent them qualifying for a record 24th semi.
• Madrid have scored in all 22 UEFA Champions League away fixtures since going down 1-0 at Olympique Lyonnais in the 2009/10 round of 16, a tie they lost 2-1 on aggregate. Madrid have suffered just four defeats – three of them in Germany – in their last 22 European away games.
• In the round of 16, Madrid became the first side to hit six goals away in the UEFA Champions League knockout stage, winning their first leg at FC Schalke 04, 6-1. It was only their second triumph on German soil, at the 26th attempt, and set up a 9-2 aggregate success.
• Ronaldo mustered nine goals in the group stage – a competition record – starting with a second-half hat-trick in another 6-1 victory, at Galatasaray. They also prevailed 2-0 at FC København and drew 2-2 at Juventus, winning Group B by nine points.
• The Merengues lifted the European Champion Clubs' Cup in Germany in 1959, downing French team Stade de Reims 2-0 at Stuttgart's Neckarstadion, and have overturned three German sides in European finals. They beat Eintracht Frankfurt 7-3 in the 1960 European Cup and Bayer 04 Leverkusen 2-1 in the 2002 UEFA Champions League, both in Glasgow; they also ousted 1. FC Köln 5-3 on aggregate in the 1986 UEFA Cup.
• Madrid's record in two-legged ties with German clubs in UEFA competition is W12 L8.
• Ancelotti is a four-time winner of the competition as player and coach. His on-aggregate knockout record against German teams as coach and player is W5 D1 L4.
• Madrid have gone through in 42 of 55 European ties after winning the first leg at home, including all eight when they initially triumphed 3-0, most recently against Galatasaray in their 2012/13 quarter-final. The largest first-leg advantage they have let slip is two goals, which has happened seven times.
• Dortmund have won eight of the 13 UEFA competition ties in which they lost the first leg away from home. The biggest margin they have overturned is a 2-0 setback, which they have managed once in three attempts.
• Dortmund's shoot-out record in UEFA competition is:
3-1 v Rangers FC, 1999/00 UEFA Cup third round
6-5 v AJ Auxerre, 1992/93 UEFA Cup semi-finals
• Madrid's shoot-out record is:
1-3 v FC Bayern München, 2011/12 UEFA Champions League semi-finals
3-1 v Juventus, 1986/87 European Cup second round
5-6 v FK Crvena zvezda, 1974/75 European Cup Winners' Cup quarter-finals
• Nuri Şahin played ten games for Madrid in 2011/12 – four in the UEFA Champions League – after signing from Dortmund. He rejoined BVB in January 2013 on an 18-month loan, having spent the first half of the season at Liverpool FC.
• While at Bayer 04 Leverkusen last term, Daniel Carvajal lost 3-0 away to Dortmund and 3-2 at home.
• Germany's Schmelzer, Mats Hummels, İlkay Gündoğan, Sven Bender, Kevin Grosskreutz and Reus are international team-mates of the injured Sami Khedira.
• All bar Bender and Grosskreutz figured in Germany's 3-1 friendly defeat by Argentina in August 2013. Khedira (own goal) and Ángel Di María were on the scoresheet for Argentina.
• Khedira notched Germany's winner in the 2-1 friendly victory in Paris in February 2013; Hummels and Gündoğan were also in the winning side, Benzema appearing for France.
• Hummels played in Germany's 1-0 UEFA EURO 2012 group stage success in Lviv over a Portugal team featuring Pepe, Fábio Coentrão and Ronaldo.
• Neven Subotić was in the Serbia side beaten 2-0 by Luka Modrić's Croatia in a FIFA World Cup qualifier in Zagreb in March 2013. He suffered an identical friendly reverse in St Gallen in May 2012 against a Spain team including Casillas, Ramos, Xabi Alonso and Raúl Albiol.
• Jakub Błaszczykowski and Lewandowski's Poland crashed 6-0 to Spain in Murcia in June 2010, Alonso scoring once.
• Khedira landed the 2006/07 Bundesliga title with VfB Stuttgart.