Bellerin names his toughest opponent

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Arsenal defender Hector Bellerin has named Bayern Munich winger Douglas Costa as the toughest opponent he has faced.
The right-back faced Costa in Arsenal's 2-0 victory over Bayern in the Champions League earlier this season and identified the Brazilian as a particularly tricky customer despite the result and clean sheet.

Costa went on to torment Mathieu Debuchy in the reverse fixture at the Allianz Arena in a 5-1 victory for the German champions.
"Probably Douglas Costa," Bellerin told Amuse when asked about his most difficult opponent in senior football. 
"You make mistakes in a game, but if you come away with a win, that's all gone. The result is all that matters, and we won that game."