A. Wenger is angry about "Chelsea's" decision to sell J. Mata to "Man Utd" club © EuroFootball.com

London's "Arsenal" coach Arsene Wenger was angered by "Chelsea's" decision to sell midfielder Juan Mata to Manchester's club.

Unlike Jose Mourinho's players, the "Gunners" will have to play against a strengthened "Man Utd" team this season.

"I think if justice is for everyone, this should not have happened. After all, "Chelsea" will no longer play against the "red devils" in the English league," the Frenchman said.

"I am surprised because J. Mata is a wonderful player and the "Blues" are selling him to their direct competitors," Wenger said.

An official announcement about the Spaniard's transfer should be made today.