James Duckworth vs Mariano Navone — R32 — Winston-Salem Open

Sixth-seeded and a 60 percent favorite with the betting market, Navone held only 7 of 10 service games and converted 2 of his 8 break points. Duckworth was the tidier of the two on the chances that mattered, taking 3 of 6 and breaking twice inside the opening four games, in game 2 for 2-0 and again in game 4 for 4-0. The seed's clearest opening came in the second, a break in game 2 for 2-0; Duckworth answered in game 7 for 3-4, then took a tiebreak in which Navone saved a match point. That is 1 hour 45 minutes of work for a man whose season against the 33-64 rank band now reads 3-4, and it puts him into the last 16 at the Winston-Salem Open.