In almost three hours and 15 minutes, Italian 10th seed Jannik Sinner outlasted Australian qualifier Thanasi Kokkinakis 6–7 (9), 6–4, 7–6 (6) on Tuesday in first-round action at the Western & Southern Open in Mason, Ohio.
On his 21st birthday, Sinner recovered after losing a lengthy first-set tiebreak in which he saved three set points and led 9–8 before losing the final three points to Kokkinakis.
