German Mischa Zverev has been slapped with a grand slam-record $US45,000 ($A56,165) fine for an “unprofessional” first-round performance at the Australian Open.
Zverev retired 48 minutes into the match while trailing Korean Hyeon Chung 6-2 4-1 at Melbourne Park.
But Open officials have clearly not accepted the world No.35’s excuse that he was suffering from a “viral illness”.
