Luis Horna (left) and Agustin Calleri squared off at last week’s Copa Telmex in Buenos AIres.

Horna, in Reebok, put on a simple silver necklace, while Calleri, in Diadora, had on a wristband with thick, monochrome vertical stripes.

(BTW, Calleri beat Horna 3-6, 6-2, 6-2.)

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