US Open finalist Leylah Fernandez edged Olympic champion Belinda Bencic 7-5 3-6 7-5 on Friday after a see-saw battle to reach the French Open fourth round for the first time. The only other time the Canadian lefthander made the second week of a major was on her run to the final at Flushing Meadows last year where she lost to fellow teenager Emma Raducanu. The 19-year-old Fernandez, who won the girls’ title three years ago at the claycourt Grand Slam, saved two set points before winning the marathon first set in 62 minutes and had to rally from an early break down in the decider against the Swi…