<p>The 10th-seed, who now ‌reached a Grand Slam fourth round ‌for only the second time, raced to a 3-0 ‌lead, with Tien looking ⁠sluggish ‌after needing five sets in the ​previous round to beat Facundo Diaz Acosta.</p><p>The ​American, ranked 18th, went into the match on a ⁠six-match winning ​streak after capturing his first clay title in Geneva last week but by the ‌time he trailed 4-1 in the second set, it was clear his winning run was about to come to an end.</p><p>A Cobolli ace and a backhand error from Tien handed his ‌opponent the second set, and ​Cobolli kept up the ‌pressure to move 3-1 up in the third, courtesy of another early break.</p><p>The 24-year-old will next play ⁠American ⁠Zachary Svajda.</p>