Group K's chasing teams meet on matchday five, with Odense BK and Wisła Kraków eager to keep their UEFA Europa League dream alive; both will be out if Fulham FC win at FC Twente in the section's other fixture.
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Victory is essential for Odense BK and Wisła Kraków as they strive to keep their UEFA Europa League adventure alive; both will be out if Fulham FC win at FC Twente in the group's other fixture.
• OB beat Wisła 3-1 in Krakow on matchday one, a scoreline that matched their hosts' worst ever home result in Europe. Andraž Kirm (54) had cancelled out an opener from OB's Andreas Johansson (35) but Peter Utaka (80) and substitute Rasmus Falk (90+2) struck to secure the win in Wisła's first meeting with Danish opponents - and OB's first match against Polish opposition.
• In total, 26 games have been played between Polish and Danish sides in UEFA club competition, with the Polish teams recording 11 wins to the Danes' nine, and six matches ending in draws.
• OB are on a three-game losing streak in Group K, including their last two home games. They have won only once - against Villarreal CF in this season's UEFA Champions League play-off round - in their last five continental fixtures at the Odense Stadion, drawing two and losing two.
• Wisła have won two of their five UEFA away games this season - both victories coming in the qualifying rounds - but have lost all four of their UEFA Cup and UEFA Europa League group stage fixtures on the road, a run that dates back to the 2006/07 competition.
• Odense's next goal will be their 100th in the UEFA Cup and UEFA Europa League; this is their 57th appearance in the two competitions.
• Odense are five goals shy of conceding their 150th in UEFA club competition; this will be their 98th UEFA game.
• Wisła's 4-1 defeat at Fulham FC on matchday four marked their 100th game in UEFA club competition; their record in those fixtures is W45 D18 L37.
• Wisła and OB met in a friendly game on 14 February 2009, with OB winning 4-2 at a mid-season training camp in Spain.
• Polish goalkeeper Arkadiusz Onyszko represented OB from 2003 to 2009. He later returned to Poland with Odra Wodzisław. He played against Wisła in the last match of his career before a serious kidney condition prompted his retirement.
• Danish tennis player Caroline Wozniacki, who has Polish roots, was born in Odense when her father, Piotr, was playing for local side Boldklubben 1909. He previously played in Poland for Miedź Legnica and Zagłębie Lubin.
• Coach Henrik Clausen has spent almost his entire career with OB, barring a brief spell as assistant coach at Vejle BK (2001-03). He led the club's youth and reserve teams for a long while before being given the senior job in 2010, guiding them to second place in the league. His side finished fourth in their section in last season's UEFA Europa League group stage - behind VfB Stuttgart, BSC Young Boys and Getafe CF.
• A 1-0 derby defeat at local rivals MKS Cracovia Kraków at the start of November prompted the dismissal of Wisła coach Robert Maaskant, who led the club to the Polish title last season. His assistant Kazimierz Moskal has been placed in temporary charge until the winter break.