Arsenal midfielder Santi Cazorla has heaped praise on Alexis Sanchez after another impressive showing against Borussia Dortmund.

The Chilean notched his 13th goal of the season last night and Cazorla says he is vital to how his side fare this term.

"Alexis is very important for us," the Spaniard told UEFA.com.

"He is in a good moment for the team and I hope he continues to play the same. He is a very important player for Arsenal."

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