Antonio Javier Arias Alvarenga[a] (born 7 September 1972) is a Paraguayan football referee.

He refereed at the 2014 FIFA World Cup qualifiers[1] and first leg of the 2015 Copa Libertadores Finals.

[2] A native of the Chaco region, Arias was praised for his performances at the 2011 South American U-20 Championship.

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