Dortmund's defender Mats Hummels (L) vies with Porto´s South Korean Hyun Jun Suk vie for the ball during the UEFA Europa League Round of 32 football match between Borussia Dortmund and FC Porto in Dortmund, western Germany on February 18, 2016. 

 / AFP / PATRIK STOLLARZ        (Photo credit should read PATRIK STOLLARZ/AFP/Getty Images)