Rafael Giotis will advance against John Sperle in the M15 Lambermont Round of 16 on August 20 and upend the expected seeding. Giotis reached this match after a three set Round of 32 fight, 1-6, 6-3, 6-3, and he will lean on that comeback form on the clay. Sperle is ranked ATP 833 while Giotis is AT…