Jack Sock leads 3 U.S. players into US Men's Clay Court Championship semifinals!‬ ‪Watch LIVE on Tennis Channel at 2 PM ET!

HOUSTON (AP) -- Top-seeded Jack Sock led three Americans into the U.S. Men's Clay Court Championship semifinals Friday night, beating sixth-seeded Feliciano Lopez of Spain 7-6 (6), 1-6, 6-4.Sock won at Forest Oaks in 2015 for his first ATP Tour title and a