However, this isn't new to Sava - he used to wear wolf masks to mark goals for his former club Gimnasia La Plata.
"I started doing the masks in Argentina, when I scored in the last minute of Gimnasia's local derby with Estudiantes.
"Then I started receiving masks from the fans - and ended up with 250 of them.
"The question at every match was 'Which mask will he wear this time?' But I had to leave every mask apart from this one back in Argentina.
"It's the first time I've done the mask in England but now I want to start the tradition again."
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