All four seeded players in action on Day 3 of the @bbtatlantaopen advanced to the quarterfinals, including @ryan.harrison92, @hyeon519, @mischazverevofficial and @johnrisner. Tell us if you think any of them will take the title this week! _ #usopenseries #atp #bbtatlantaopen #tennis #protennis #ryanharrison #hyeonchung #johnisner #mischazverev