Rafael Nadal pointed the finger at the ATP for a rash of injuries to top players - including the leg muscle problem which forced him to quit his Australian Open quarter-final on Tuesday against Marin Cilic.
The world number one was set to undergo a Wednesday scan after quitting in pain in the fifth set against Marin Cilic to lose 3-6, 6-3, 6-7 (5-7), 6-2, 2-0 before limping off court.
"Somebody who is running the tour should think little bit about what's going on," Nadal said as he quit a match for only the third time in a decade.
"Too many people getting injured. I don't know if they (ATP) have to think a little bit about the health of the players.
"There is life after tennis. I don't know if we keep playing in this very, very hard surfaces what's going to happen in the future with our lives."
Roger Federer, at age 36, remains the only competitor from the so-called big four, who is injury-free and lining up as a repeat trophy favourite at Melbourne Park.
Out of the event are Andy Murray (hip surgery recovery), Nadal and Novak Djokovic, whose long-running elbow problem flared during a loss in the fourth round on Monday.
Nadal said that his match pain occurred "high on the leg."
"We will communicate what's going on after the MRI. This is not the moment to say what's going on or what not going on because we really don't know and the doctor really don't know yet.
"It's better to wait just a few hours.
"I played 3 hours 50 the other day. Today I was playing over 3 hours. I was running quite well."
Nadal added that his disappointment was immense.
"We worked as much as we could to be ready (during the off-season). We thought we were ready. At least I was in the quarter-finals.
"I was playing good tennis, I was fighting for a grand slam."
Rafael Nadal says too many players are getting injured.
