FC Schalke 04 welcome back a familiar face in Hamit Altıntop when Galatasaray AŞ visit Gelsenkirchen for the second leg of the clubs' UEFA Champions League round of 16 tie.
• Hamit Altıntop spent four seasons with Schalke, his home-town club, while team-mates Hakan Balta, Engin Baytar, Ceyhun Gülselam and Furkan Özçal were also born in Germany.
• Both clubs have cause for confidence, with Schalke unbeaten at home in this season's UEFA Champions League and Galatasaray looking to complete a hat-trick of away victories in the competition. The Bundesliga club hold an away-goals advantage following the 1-1 first-leg draw in Istanbul.
• Schalke have lost just twice in 16 home games in UEFA competition since the start of 2010/11, winning 11 of them.
• Victorious in their last two group stage away fixtures, at CFR 1907 Cluj and SC Braga, Galatasaray's UEFA Champions League record on their travels since September 2008 is W9 D6 L2.
• Schalke have a 100% home record against Turkish opponents. Martin Max's goal earned them a 1-0 victory over Trabzonspor AŞ in the 1996/97 UEFA Cup second round, a campaign that ended with them lifting the trophy.
• Hamit Altıntop was in the Schalke side that overcame Fenerbahçe SK 2-0 in Gelsenkirchen in the 2005/06 UEFA Champions League group stage through goals from Kevin Kuranyi and Ebbe Sand.
• Galatasaray have won more games away to Bundesliga opposition than they have done at home. Their record in Germany reads W4 D4 L5.
• On the last occasion Galatasaray visited Germany they drew 1-1 at Hamburger SV in the first leg of a 2008/09 UEFA Cup round of 16 tie that they eventually lost 4-3 on aggregate. Their last away victory against Bundesliga opposition came at Hertha BSC Berlin in the 2008/09 UEFA Cup group stage, the recently departed Milan Baroš scoring the only goal from the penalty spot.
• Galatasaray overcame 1. FC Magdeburg, the first German side they faced, on the toss of a coin after three 1-1 draws in the preliminary round of the 1964/65 European Cup Winners' Cup.
• Schalke reached the UEFA Champions League quarter-finals in 2010/11, when they were semi-finalists, and in 2007/08. Their only other run to the last eight was back in 1958/59.
• The German club have won eight of the ten UEFA competition ties in which they have drawn the first leg away, although both defeats – against FC Shakhtar Donetsk in the 2004/05 UEFA Cup round of 32 (0-1 home) and Wisła Kraków in the 2002/03 UEFA Cup third round (1-4 home) – came after 1-1 draws. Schalke have won two other ties when they have drawn 1-1 away first, however.
• Galatasaray are hoping to reach the European Cup quarter-finals for the first time since 2001 and fifth time overall.
• Ominously for the Turkish champions, they have won only one of the nine European ties in which they have been held at home in the first leg, defeating OFK Beograd 5-1 in the second instalment of the 2010/11 UEFA Europa League third qualifying round after a 2-2 draw in Istanbul. Even then they lost on away goals to FC Karpaty Lviv in the next round, drawing 2-2 at home and 1-1 away. They have recorded four 1-1 home first-leg draws and lost every tie.
• Schalke's shoot-out record in UEFA club competitions is:
4-1 v FC Porto, 2007/08 UEFA Champions League round of 16
1-3 v Brøndby IF, 2003/04 UEFA Cup second round
4-5 v SK Slavia Praha, 1998/99 UEFA Cup first round
4-1 v FC Internazionale Milano, 1996/97 UEFA Cup final
• Galatasaray's shoot-out record is:
4-1 v Arsenal FC, 1999/2000 UEFA Cup final
• As a Turkish international, Fatih Terim appeared in five matches against Germany, losing four of them, beginning with a 5-0 home friendly defeat in 1975. The only exception was a 0-0 home draw in April 1979 in UEFA European Championship qualifying. He also appeared against East Germany in 1978 FIFA World Cup qualifying, Turkey posting a home defeat and an away draw.
• In his first spell as Galatasaray coach Terim lost home and away to Borussia Dortmund in the 1997/98 UEFA Champions League group stage. His team fared better against Bundesliga opponents in 1999/2000. In that season's UEFA Champions League they drew 2-2 at home to Hertha BSC Berlin and then beat them 4-1 away to secure third place in their group and entry into the UEFA Cup, where they defeated Dortmund in the fourth round – winning 2-0 away for an identical aggregate success – en route to lifting the trophy.
• As Turkey coach Terim lost out to Christoph Metzelder's Germany in the UEFA EURO 2008 semi-finals. Hamit Altıntop, Hakan Balta, Sabri Sarıoğlu and Gökhan Zan all featured as Turkey went down 3-2 in Basel.
• Hamit Altıntop was born in Gelsenkirchen and played for Schalke between 2003 and 2007, making 113 league appearances and scoring eight goals before moving on to FC Bayern München.
• Of Galatasaray's other German-born contingent, Hakan Balta started his professional career in Hertha's reserve team and Engin Baytar did likewise at DSC Arminia Bielefeld while Ceyhun came through the youth ranks at SpVgg Unterhaching, spending two seasons in their first team between 2006 and 2008.
• Didier Drogba scored Chelsea FC's equalising goal and then converted the winning penalty when they overcame FC Bayern München in last May's UEFA Champions League final. Drogba has struck five goals in nine appearances against Bundesliga opposition, including one in Chelsea's 2-0 home win against Schalke in the 2007/08 group stage. He also appeared in the 0-0 return draw in Gelsenkirchen.
• Wesley Sneijder was in the FC Internazionale Milano side deposed as European champions by Schalke in the 2010/11 quarter-finals, losing 5-2 at home and 2-1 in Gelsenkirchen. Sneijder had helped Inter beat Bayern in the 2010 final. Sneijder and Huntelaar, a half-time substitute, were in the Netherlands side beaten 2-1 by Germany in the UEFA EURO 2012 group stage.
• Benedikt Höwedes appeared as a substitute in Germany's 3-1 win at the Ali Sami Yen Spor Kompleksi in UEFA EURO 2012 qualifying. Sabri, Hamit Altıntop, Hakan Balta, Umut Bulut, Selçuk İnan and Burak Yılmaz all played for Turkey, Hakan Balta scoring the hosts' goal.
• Höwedes also came off the bench when Germany beat Fernando Muslera's Uruguay 2-1 in a May 2011 friendly.
• Christian Fuchs faced Turkey's Galatasaray contingent in an Austria side beaten 2-0 in Istanbul in UEFA EURO 2012 qualifying and held 0-0 at home.
• Ciprian Marica played in Romania's 1-0 victory over Turkey in FIFA World Cup qualifying in Istanbul in October 2012. Hamit Altıntop, Semih Kaya, Emre Çolak and Umut were on the losing team.
• Teemu Pukki scored in Finland's 3-2 friendly win against Turkey last May. Burak hit both Turkey goals in a match also featuring Hamit Altıntop, Umut, Semih Kaya and Yekta Kurtuluş.
• Klaas-Jan Huntelaar struck the 52nd-minute winner when a Netherlands side including Ibrahim Afellay overcame Turkey 1-0 in a November 2010 friendly. Hamit Altıntop, Umut, Selçuk İnan, Burak and Sabri started for Turkey with Engin Baytar and Yekta appearing as substitutes.
• Johan Elmander scored Sweden's third goal when they wiped out a four-goal deficit to draw 4-4 with Germany in a World Cup qualifier in Berlin in October.
• Nordin Amrabat and Afellay were team-mates at PSV Eindhoven between 2008 and 2011. Afellay appeared in PSV's 2-0 home defeat of Galatasaray in the 2006/07 UEFA Champions League group stage.
• Jefferson Farfán was in that PSV side and also featured when they won 2-1 in Istanbul in that same campaign. Farfán faced Galatasaray's rivals Fenerbahçe SK four times during his PSV career, losing on both visits to Istanbul but scoring in a 2-0 home success in the 2005/06 group stage.
• Tranquillo Barnetta helped Bayer 04 Leverkusen eliminate Galatasaray 5-1 on aggregate in the 2007/08 UEFA Cup round of 32, but was also in the Switzerland side eliminated from UEFA EURO 2008 on home soil after a 2-1 defeat by Turkey.
• Joel Matip and Dany Nounkeu have played together for Cameroon.
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