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VIENNA, AUSTRIA - JULY 16: Diego Costa (L) of Chelsea competes for the ball with Tomas Szanto (R) of Rapid Vienna during an friendly match between SK Rapid Vienna and Chelsea F.C. at Allianz Stadion on July 16, 2016 in Vienna, Austria. (Photo by Matej Divizna/Getty Images)

VIENNA, AUSTRIA - JULY 16:  Diego Costa (L) of Chelsea competes for the ball with Tomas Szanto (R) of Rapid Vienna during an friendly match between SK Rapid Vienna and Chelsea F.C. at Allianz Stadion on July 16, 2016 in Vienna, Austria.  (Photo by Matej Divizna/Getty Images)