McDonald into last 16 at Cincinnati Masters following retirement from Rune

American wild card Mackenzie McDonald moved into the last 16 of the Cincinnati Masters when Dane Holger Rune, the No 6 seed, retired on Wednesday night at the Linder Tennis Family Center.

McDonald, ranked No 43, led 6-4, 2-0 when Rune — ranked No 5 — called it quits.

The American will play Frenchman Adrian Mannarino next.

Ahead of his victory, Mackenzie McDonald won against German Yannick Hanfmann (7-5, 6-1).

Cincinnati Masters, other second-round results:

• Frances Tiafoe vs. Stan Wawrinka
• Alexei Popyrin vs. Nicolas Jarry
• Alejandro Davidovich Fokina vs. Novak Djokovic
• Gael Monfils beat Alex De Minaur: 7-5, 6-4
• Stefanos Tsitsipas (4) beat Ben Shelton: 7-6 (3), 7-6 (2)
• Hubert Hurkacz beat Borna Coric (15): 5-7, 6-3, 6-3
• Max Purcell (Q) beat Casper Ruud (5): 6-4, 3-6, 6-4
• Taylor Fritz (9) beat Lorenzo Sonego: 6-4, 7-6 (1)
• Dusan Lajovic (Q) beat Jannik Sinner (8): 6-4, 7-6 (4)
• Daniil Medvedev (3) beat Lorenzo Musetti: 6-3, 6-2
• Alexander Zverev (16) beat Yoshihito Nishioka: 7-5, 6-4
• Tommy Paul (14) beat Ugo Humbert: 6-1, 7-6 (4)
• Carlos Alcaraz (1) beat Jordan Thompson (Q): 7-5, 4-6, 6-3
• Adrian Mannarino beat Felix Auger-Aliassime (12): 6-4, 6-4
• Emil Ruusuvuori beat Andrey Rublev (7): 7-6 (10), 5-7, 7-6 (3)