Maria Sharapova seen struggling with the heat between games.Credit:Getty Images
Tomic needed inhaler medication during the second set of his qualifying loss to Denis Kudla. The 27-year-old did not indicate he had any history of respiratory problems when asked.
"[It feels like] no air is going in. I'm getting tired so easy ... I just can't breathe,"he said.
He will miss the Australian Open for the second time in three years unless he is handed a wildcard,which is unlikely.
Earlier on Tuesday,Australian Open tournament director and Tennis Australia chief executive officer Craig Tiley said on-site air quality testing and medical,environmental,scientific and meteorological experts would continue to be consulted when deciding if it was safe for play to go ahead in such conditions.
"Like when it is too hot or when raining,play will be suspended should the above measures deem that necessary,"Tiley said.
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Qualifiers were delayed by an hour from 10am to 11am on Tuesday due to the smoke.
"We are also consulting closely with the WTA and the ATP and the decision we made this morning,both tours supported those and recommended those,"Tiley said."This is a new experience for all of us,how we manage air quality,and therefore we have got to rely on those experts that advise us how best to continue."
The breathing difficulties players observed on Tuesday did not immediately cause the policy,which has not been released,to be adjusted,a Tennis Australia spokeswoman said.
The vast majority of matches were completed fully or without medical assistance required.
Bouchard said she did not consider quitting during her match."I definitely started feeling unwell,"Bouchard said.
"No cough,just heavy air,a bit tough to breathe and when you're out of breath after a long,tough point I felt I couldn't breathe well and that feeling made me a bit nauseous."
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At the Kooyong Classic,Maria Sharapova and Laura Siegemund abandoned their game after almost three hours due to a combination of smoke and heat.
"I started feeling a cough coming toward the end of the second set but I've been sick for a few weeks so I thought that had something to do with it,"Sharapova told SBS."Then I heard Laura speak to the umpire and she said she was struggling with it as well."
The Australian Open proper begins on Monday.
with AAP