
Shelton vs. Etcheverry, Tiafoe vs. Darderi
Three of the top four seeds have advanced to the Houston semifinals and No. 1 Ben Shelton will face No. 4 Tomas Martin Etcheverry on Saturday. No. 3 Frances Tiafoe will look to fend off unseeded challenger Luciano Darderi.(1) Ben Shelton vs. (4) Tomas Martin EtcheverryShelton had never even been to an ATP quarterfinal on…