Four American Men Reach Citi Open Quarterfinals
Four American men pushed their way into the Citi Open quarterfinals in Washington, D.C. on Thursday, as John Isner, Jack Sock, Steve Johnson and Sam Querrey all won their respective third round matches to reach the final eight. In an all-American showdown, the fifth-seeded Johnson notched a routine 6-4, 6-4 victory to defeat Ryan Harrison….

