LVIV, UKRAINE - FEBRUARY 17: Referee Alberto Undiano Mallenco loosk on during the UEFA Champions League round of 16 first leg match between FC Shakhtar Donetsk and FC Bayern Muenchen at Arena Lviv on February 17, 2015 in Lviv, Ukraine. (Photo by Alexander Hassenstein/Bongarts/Getty Images)
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Bongarts Alexander Hassenstein

DORTMUND, GERMANY - DECEMBER 09: Referee Alberto Undiano Mallenco looks on during the UEFA Champions League Group D match between Borussia Dortmund and RSC Anderlecht at Signal Iduna Park on December 9, 2014 in Dortmund, Germany. (Photo by Alex Grimm/Bongarts/Getty Images)
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Bongarts Alex Grimm

LVIV, UKRAINE - FEBRUARY 17: Referee Alberto Undiano Mallenco shows Xabi Alonso of Bayern Muenchen a red card during the UEFA Champions League round of 16 first leg match between FC Shakhtar Donetsk and FC Bayern Muenchen at the Donbass Arena on February 17, 2015 in Lviv, Ukraine. (Photo by Alexander Hassenstein/Bongarts/Getty Images)
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Bongarts Alexander Hassenstein

MUNICH, GERMANY - SEPTEMBER 17: Referee Alberto Undiano Mallenco reacts during the UEFA Champions League Group E match between Bayern Munchen and Manchester City at the Allianz Arena on September 17, 2014 in Munich, Germany. (Photo by Alex Grimm/Bongarts/Getty Images)
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Bongarts Alex Grimm

DORTMUND, GERMANY - DECEMBER 09: Referee Alberto Undiano Mallenco looks on during the UEFA Champions League Group D match between Borussia Dortmund and RSC Anderlecht at Signal Iduna Park on December 9, 2014 in Dortmund, Germany. (Photo by Alex Grimm/Bongarts/Getty Images)
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Bongarts Alex Grimm