Isner Withdraws from US Clay With Foot Injury Two-time Defending Champion Johnson Becomes Top Seed HOUSTON – John Isner has withdrawn from the upcoming Fayez Sarofim & Co. U.S. Men’s Clay Court Championship due to the foot injury he suffered in Miami. “It is really unfortunate that I have to withdraw from Houston, one of my favorite events of the year due to an injury … [Read more...] about Isner Withdraws from US Clay Court With Foot Injury