Defending champion Robert Bautista-Agut of Spain has withdrawn from the ASB Tennis Classic without playing a match, citing a stomach virus.
The top-seeded Bautista-Agut had a bye in the first round and was due to play 2015 champion Jiri Vesely in his second round match on Wednesday. But the 28-year-old Spaniard, ranked 13 and the winner of the recent Chennai Open, informed organizers he was unable to play.
His place in the second round will go to a lucky loser from the qualifying draw.
Third-seeded David Ferrer, a four-time champion, was due to face Robin Haase in the first match of the second round Wednesday, while second-seeded John Isner will face Malek Jaziri. Fourth-seeded Jack Sock will play fellow American Ryan Harrison.