Vina del Mar, Chile ( - Former top-10 star Tommy Robredo went by way of a second-round upset Wednesday at the Chile Open tennis tournament.

Argentine Leonardo Mayer upended the second-seeded Spaniard 3-6, 7-6 (10-8), 6-4 on the red clay at Club Naval. The world No. 16 Robredo captured this event in Santiago three years ago.