John Isner will be back in Cincinnati action one day after stunning top seed Novak Djokovic in the quarterfinals. Up next for Isner is a Saturday rematch of the Washington, D.C. final with Juan Martin Del Potro.

Juan Martin Del Potro and John Isner will be going head-to-head for the fifth time in their careers and for the second time this summer when they collide in the semifinals of the Western & Southern Open on Saturday afternoon. Del Potro has won all four of their previous encounters and all four have come on hard courts. He most recently defeated Isner 3-6, 6-1, 6-2 earlier this month in the Washington, D.C. title match.

Isner may be 1-8 lifetime against Del Potro, but the 6’10” American is positively on fire at the moment. While he almost always is on U.S. hard courts, this is an impressive hot streak even by Isner’s standards…