Rebels' Zivkovic upsets 12th-ranked player

UNLV men's tennis senior Nenad Zivkovic stunned the nation's 12th-ranked player Thursday to move on to the round of 16 at the Rolex National Intercollegiate Indoor Championships in Dallas.

Zivkovic, who currently holds a career-high ranking of 54th, swept Nathan Overholser of Florida, 6-4, 6-3 in the first round of the third leg of the collegiate grand slam. Zivkovic, who improved to 8-2 on the year, faced 69th-ranked Matt Prentice of Oklahoma State in today's second round.

The tournament runs through Sunday.

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