Klinger is 18-11 and ranked No. 39. Two of his losses are to then-No. 2 K.J. Hippensteel of Stanford and then-No. 3 Harsh Mankad of Minnesota.
Kolev, from Sydney, Australia, hasn't played since May 12 when the Razorbacks were eliminated from the NCAAs by No. 11 Southern Cal, 4-0. USC has since advanced to tonight's championship match against defending national champion Georgia.
Kolev, who was 26-12 a year ago, won his last completed match on May 11 against No. 90 Pawel Sebastyanski of Tulsa, 6-0, 6-2, in Arkansas' 4-3 win over the Golden Hurricane in the first round of the NCAA Tournament.
The winner advances to Thursday's second round and meets the winner between Mankad and Tulane's Michael Kogan.