Atlético Madrid and Bayern München have been regulars in the last four in recent years, although it is their meeting in the 1974 final that most sticks in the memory.
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Club Atlético de Madrid and FC Bayern München have been UEFA Champions League semi-finals regulars in the last few years – although their only previous fixture came more than 40 years ago.
• While Diego Simeone's Atlético have reached the last four for the second time in three years, Bayern are appearing at this stage for the fifth season in a row.
• This tie will prompt particularly fond memories for Bayern, who claimed the first of their five European Cups in 1974 with victory against Atlético after a replay – the only time that happened in a final.
• The teams have played only twice before, in that 1974 European Cup final – both sides' first. Atlético were seconds away from taking the trophy at the Heysel Stadium in Brussels before Hans-Georg Schwarzenbeck's 120th-minute equaliser gave Bayern a 1-1 draw.
• The sides on 15 May 1974 were:
Bayern: Maier, Hansen, Beckenbauer, Schwarzenbeck, Breitner, Roth, Zobel, Kapellmann, Torstensson (Dürnberger 75), Müller, Hoeness.
Atlético: Reina, Melo, Heredia, Eusebio, Capón, Adelardo, Aragonés, Salcedo (Alberto 85), Ufarte (Becerra 60), Irureta, Gárate.
• Two days later, the teams returned to the Heysel Stadium for what would be the only final replay in European Cup history, and this time Bayern ran out 4-0 winners thanks to two goals each from Uli Hoeness (28 82) and Gerd Müller (56 69). It was the first of what would be three successive final triumphs for Bayern.
• The sides on 17 May 1974 were:
Atlético: Reina, Melo, Heredia, Eusebio, Capón, Adelardo (Benegas 59), Aragonés, Salcedo, Gárate, Alberto (Ufarte 65), Becerra.
Bayern: Maier, Hansen, Beckenbauer, Schwarzenbeck, Breitner, Roth, Zobel, Kapellmann, Torstensson, Müller, Hoeness.
• This is Atlético's fifth European Cup semi-final; their record is W2 L2. Two years ago, they overcame Chelsea FC 3-1 on aggregate at this stage.
• Atlético's European Cup semi-finals in full:
3-1 v Chelsea FC, 2013/14 (0-0 h, 3-1 a)
2-0 v Celtic FC, 1973/74 (0-0 a, 2-0 h)
1-3 v AFC Ajax, 1969/70 (1-0 h, 0-3 a)
2-2 v Real Madrid CF, 1959/60 (1-2 a, 1-0 h, 1-2 replay)
• The Spanish side have not lost at home in a European Cup semi-final; their record over their four previous ties is W3 D1.
• Atlético are unbeaten in their last five home matches against German clubs (W4 D1) going back to a 1-0 defeat by Borussia Dortmund in the 1996/97 group stage.
• Atlético have lost just one of their last seven games against German clubs. Their home record is P16 W11 D2 L3; as a whole it is P34 W16 D6 L12.
• The last German visitors to the Vicente Calderón were Bayer 04 Leverkusen in last season's round of 16; Atlético won 1-0 on the night and 3-2 on penalties.
• This is Atlético's fifth European semi-final against a German club; their record is W3 L1. Overall in two-legged ties with Bundesliga opposition, their record reads W10 L4. They have won the last six such ties.
• Diego Simeone's side have lost at home this term, going down 2-1 to SL Benfica on matchday two – but have nevertheless won 24 of their last 29 European matches at the Vicente Calderón, including the 2-0 defeat of holders FC Barcelona in this season's quarter-final second leg. The only other setback was a 2-0 reverse against FC Rubin in the UEFA Europa League round of 32 in February 2013.
• Bayern have lost in Spain in the first leg of the semi-finals in each of the last two seasons, going down 1-0 at Real Madrid in 2013/14 (0-5 aggregate) and 3-0 at Barcelona last year (3-5 aggregate).
• The German club have won on only two of their last 12 trips to Spain, losing eight. Their record in Spain is P23 W6 D5 L12; overall against Spanish clubs it is P49 W23 D12 L14.
• Josep Guardiola's team have won only two of their last nine UEFA Champions League away games, losing four.
• Furthermore, Bayern have not won any of their last seven knockout games away from home (D4 L3), since a 2-0 success at Arsenal FC in the 2013/14 round of 16 first leg.
• Bayern's European Cup semi-final record is W10 L7:
3-5 v FC Barcelona, 2014/15 (0-3 a, 3-2 h)
0-5 v Real Madrid CF, 2013/14 (0-1 a, 0-4 h)
7-0 v FC Barcelona, 2012/13 (4-0 h, 3-0 a)
3-3 v Real Madrid CF 3-3, won 3-1 on penalties, 2011/12 (2-1 h, 1-2 a)
4-0 v Olympique Lyonnais, 2009/10 (1-0 h, 3-0 a)
3-1 v Real Madrid CF, 2000/01 (1-0 a, 2-1 h)
2-3 v Real Madrid CF, 1999/2000 (0-2 a, 2-1 h)
4-3 v FC Dynamo Kyiv, 1998/99 (3-3 a, 1-0 h)
2-5 v AFC Ajax, 1994/95 (0-0 h, 2-5 a)
3-4 v FK Crvena zvezda, 1990/91 (1-2 h, 2-2 a)
2-2 v AC Milan 2-2, lost on away goals, 1989/90 (0-1 a, 2-1 h)
4-2 v Real Madrid CF, 1986/87 (4-1 h, 0-1 a)
7-4 v PFC CSKA Sofia, 1981/82 (3-4 a, 4-0 h)
1-1 v Liverpool FC, 1-1, lost on away goals, 1980/81 (0-0 a, 1-1 h)
3-1 v Real Madrid CF, 1975/76 (1-1 a, 2-0 h)
2-0 v AS Saint-Étienne, 1974/75 (0-0 a, 2-0 h)
4-1 v Újpest FC, 1973/74 (1-1 a, 3-0 h)
• Bayern have played ten previous European semi-finals against Spanish clubs, with the record W7 L3. In two-legged ties against Liga clubs their record is W9 L8.
Coach and player links
• Simeone and Guardiola were regular opponents as players, playing in ten club matches when Simeone was with Atlético and Sevilla FC and Guardiola was at Barcelona. Simeone recorded three wins to Guardiola's four, although the Argentinian did come out on top in the 1996 Copa del Rey final, Atlético winning 1-0 after extra time.
• Simeone also helped Argentina to a 2-0 friendly victory against Guardiola's Spain in Seville on 17 November 1999.
• As coaches they have faced off only once – a 2-1 Liga win for Guardiola's Barça at the Calderón on 12 May 2013.
• Guardiola faced Atlético 22 times as a player while at Barcelona, scoring once (W13 D5 L4). As Barcelona coach, Guardiola faced Atlético ten times, winning eight and losing twice.
• Have played in Spain:
Javi Martínez (Athletic Club, 2006–13) – P13 W5 L8 v Atlético
Thiago Alcántara (Barcelona, 2008–13) – P2 W2 v Atlético
Juan Bernat (Valencia CF, 2012–14) – P4 D2 L2 v Atlético
Xabi Alonso (Real Sociedad, 2001–04, Real Madrid, 2009–14) – P23 W15 D5 L3 v Atlético
Arjen Robben (Real Madrid, 2007–09) – P1 D1 v Atlético
• Have played for same national team:
Douglas Costa & Filipe Luís (Brazil)
Kingsley Coman, Franck Ribéry & Antoine Griezmann (France)
Juan Bernat, Javi Martínez, Xabi Alonso, Thiago Alcántara & Juanfran, Koke, Fernando Torres (Spain)
• Koke and Thiago both played in the 2013 UEFA European Under-21 Championship final, the latter scoring a hat-trick in Spain's 4-2 defeat of Italy.
• Have played together:
Miguel Ángel Moya & Juan Bernat (Valencia 2011–12)
Tiago & Arjen Robben (Chelsea, 2004–05)
• Diego Godín scored the opener as Uruguay beat Arturo Vidal's Chile 3-0 in 2018 FIFA World Cup qualifying in November 2015.
• Fernando Torres got the only goal as Spain overcame Germany 1-0 in the UEFA EURO 2008 final in Vienna. Philipp Lahm was in the Germany side; Alonso came on as a substitute for Spain.
• Robben scored in the Netherlands' 3-2 2010 World Cup semi-final win against Godín's Uruguay. Godín and Uruguay lost by the same score to Germany in the third-place play-off, Thomas Müller scoring for Germany with Manuel Neuer and Holger Badstuber unused substitutes.
• Robert Lewandowski got Poland's goal in a 1-1 draw against Stefan Savić's Montenegro in a World Cup qualifier on 6 September 2013.
• A Mario Götze goal was not enough to prevent a Germany side also including Neuer and Müller losing 4-2 at home to an Argentina XI for whom Augusto Fernández was a half-time substitute in a friendly on 3 September 2014.
• Fernando Torres is available again after a one-match ban.
• Atlético have won their last five league games, most recently a 1-0 success at home against Málaga CF on 23 April, substitute Ángel Correa scoring the only goal.
• Atlético have not conceded in their last four competitive games.
• Fernando Torres drew a blank on Saturday having scored in each of his previous five matches.
• Diego Godín aggravated a hamstring injury during Atlético's 1-0 win at Athletic, two weeks after recovering from the same problem, and did not feature against Málaga.
• José Giménez (hamstring) and Tiago (knee) have also been struggling with injuries, though the former featured against Málaga.
• Antoine Griezmann has scored 29 goals in all competitions this season.
• Jan Oblak has kept 22 clean sheets this season, more than any other goalkeeper in Atlético's history, overtaking Thibaut Courtouis's 20 clean sheets in 2012/13 and 2013/14.
• Bayern have won nine of their last ten games following a 2-0 success at Hertha BSC Berlin on Saturday.
• Robert Lewandowski ended a run of six matches without a goal for club and country with two in a 3-0 win against FC Schalke 04 on 16 April.
• Lewandowski has 46 goals in 53 outings for club and country in 2015/16.
• Thomas Müller scored twice as Bayern defeated SV Werder Bremen 2-0 at home on 19 April in the last four of the German Cup. Guardiola’s side face Borussia Dortmund in the final on 21 May.
• Müller's opener against Bremen was his 150th competitive goal for Bayern.
• Bayern announced on 20 April that Manuel Neuer had extended his contract until the summer of 2021.
• Medhi Benatia (out since 25 March, thigh) returned against Schalke.
• Arjen Robben (adductor) has been out since 13 March.
• Holger Badstuber fractured an ankle in training on 13 February and will miss the rest of the season.
• Jérôme Boateng has yet to return to action following a groin injury sustained in the 2-1 win at Hamburger SV on 22 January, although he has resumed training.