Nick Kyrgios claims a stomach bug prompted him to retire from his Shanghai opener.
The ATP isn't buying it and now it will cost Kyrgios.
More: Kyrgios Walks off in Shanghai
The ATP Tour fined the 22-year-old Aussie $10,000 and rescinded the $21,000 prize money he earned at the Masters Series event.
After American Steve Johnson took the first set from Aussie No. 1, 7-6 (5), Kygrios, who was upset by line calls earlier in the set, walked off the court in a bizarre retirement from the first-round match.
The 21st-ranked Kyrgios incurred two code violations from unsportsmanlike conduct, including a point penalty during the tie break when he continued venting over questionable calls.
A courtside microphone caught Kyrgios telling his box he would stop playing if he lost the set.
When the set ended, Kyrgios walked to net, shook Johnson's hand, shook the chair umpire's hand, picked up his bag and bailed after 47 minutes of play as some fans jeered.
Kyrgios apologize for his actions on Twitter saying he was battling both a stomach bug and sore shoulder. However, the ATP refused to allow him to collect his prize money because he never filed a medical report detailing his illness or injury.
Kyrgios could also face a suspension for his actions in Shanghai, which came a year after he was suspended and fined for tanking his Shanghai Rolex Masters opener against Mischa Zverev.
Photo credit: Tennis Australia