Kyle Edmund is through to the third round of the Winston-Salem Open after beating Russia's Daniil Medvedev, but fellow Briton Aljaz Bedene is out.
British number two Edmund, 22, overcame Medvedev 2-6 6-2 7-6 (8-6) in North Carolina and will play either Marton Fucsovics or Joao Sousa in the last 16.
Bedene, ranked 48th in the world - three places below Edmund - lost 6-4 7-5 to Italy's Andreas Seppi.
Britain's Brydan Klein lost in the first round of US Open qualifying.
The 27-year-old, ranked 169th in the world, was beaten 6-3 3-6 7-6 by France's Vincent Millot.