Sporting must win to be sure of making it to the round of 32, while defeat could spell disaster for Beşiktaş as the sides meet on the last day of UEFA Europa League Group H.
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Sporting Clube de Portugal and Beşiktaş JK look to be facing a straight battle for a UEFA Europa League round of 32 place as they come together in Group H on matchday six.
• Sporting will qualify with a win or with a draw, on head-to-head record at FC Lokomotiv Moskva's expense, if the Russian outfit lose to KF Skënderbeu.
• Beşiktaş need only avoid defeat to make it through. They will miss out if they lose and Lokomotiv win.
• Beşiktaş have an identical head-to-head record in their games against Lokomotiv, which means goal difference – and then goals scored – would be used to separate the sides in the event that they finished level on nine points.
• The teams drew 1-1 in Istanbul when they met for the first time in UEFA competition on matchday two.
• Sporting's record in five matches against Turkish opposition is W1 D3 L1 (W1 D0 L1 at home).
• Beşiktaş's record in eight games against Portuguese clubs is W2 D2 L4 (W2 D1 L1 in Portugal).
• Sporting have lost only one of their last six European home fixtures (W4 D1 L1) – a 3-1 reverse against Lokomotiv on matchday one.
• With a record of W2 D3 in five Group H contests, Beşiktaş are on target to make it through the UEFA Europa League group stage unbeaten for a second season in succession.
• Beşiktaş ended an unusual run of nine European games without scoring more than once in a match with a 2-0 home success against Skënderbeu on 26 November.
• In five previous UEFA Cup and UEFA Europa League group stage campaigns, Sporting have only once failed to make it to the round of 32 – in their most recent campaign, in 2012/13.
• The competition's new identity has played well with Beşiktaş: they failed to negotiate all three of their UEFA Cup group stage campaigns, but have been successful in all three of their UEFA Europa League ones.
Trivia and links
• The journey from Istanbul to Lisbon is around 3,250km.
• Beşiktaş's Portugal winger Ricardo Quaresma started his playing career at Sporting, leaving the club for FC Barcelona in 2004. This is the second time he has faced his erstwhile employers in a UEFA encounter.
• Sporting's Alberto Aquilani and Beşiktaş loanee Mario Gomez were team-mates at ACF Fiorentina last term.
• With 41 goals, Gomez is the fourth highest-scoring German player in UEFA club competition history and will join Ulf Kirsten in third place with two more strikes.
• Sporting's Bryan Ruiz and Beşiktaş's Kerim Frei were team-mates at Fulham FC from 2011 to 2013.
• Sporting forward Teófilo Gutiérrez played in Turkey for Trabzonspor AŞ from 2010 to 2011, where his team-mates included Beşiktaş goalkeeper Tolga Zengin.
• A losing UEFA Europa League finalist with SL Benfica in 2013 and 2014, Jorge Jesus unexpectedly left the Eagles for fierce local rivals Sporting this summer. The 61-year-old had started his playing career at Sporting – where his father Virgolino had also been a player – and had coached Benfica since 2009.
• Former Trabzonspor AŞ and Turkey goalkeeper Şenol Günes took charge at Beşiktaş in June this year. He famously coached Turkey to a bronze-medal finish at the 2002 FIFA World Cup. He has also won two Turkish Cups in the course of four spells as Trabzonspor coach.