Jessica Pegula vs Diana Shnaider — R16 — Canadian Open

Everything turned on the second ball. Shnaider won 12 of 19 points behind hers to Pegula's 6 of 19, and the return half matched it, the No. 15 seed taking 13 of 19 second-serve returns and converting four of seven break points. Pegula arrived a 70 percent favorite with the betting market and 3-0 in meetings on record, the last of them a Washington Open semifinal seven days earlier, then got broken in games 8 and 9 of the opener and held only 5 of 9 service games. It ended on the No. 3 seed's serve in the ninth game of the second set, one match point saved before the next one stuck, 1 hour 6 minutes in. A quarterfinal with Iga Swiatek, the No. 8, is next.