Scans to determine Cooper's future
Initial scans revealed no fractures, but the full results will reveal the immediate future of Wallaby flyhalf Quade Cooper.
The Reds No.10, Cooper, was sent to hospital for precautionary scans on Friday, following a tackle in the last minute of their 13-16 pre-season loss to the Melbourne Rebels at Ballymore.
Cooper was kept overnight and had X-rays, which showed no sign of any fractures.
"He underwent an MRI scan this [Saturday] morning and preliminary results indicate there is no serious damage," the Reds' medical staff said in a statement, adding that they expect to know the full results of the scan only on Monday.
"While a little stiff and sore from the collision, Cooper is out of hospital and mobile," the statement said.
A further update on Cooper's status will be made as soon as the full results of the MRI scan are known.
However, Reds coach Richard Graham remained upbeat.
"We really have to see how the spasm settles down in the next 24-48 hours," Graham told AAP.
"We really have to see how the spasm settles down in the next 24-48 hours.
"But we're confident he'll be right to play."
The Reds met tough opposition in their second and final pre-season match, losing to the Melbourne-based Rebels.
The game had a different tempo than the Reds' 31-20 win over the Chiefs in Toowoomba last weekend, with a much more physical encounter on display at Ballymore in front of 8,778 fans.
In the final minutes of the game, a stiff tackle caught the Reds' playmaker, Cooper awkwardly.
Cooper was slow to respond from the tackle and was stretchered from the field as a precaution. He will undergo precautionary scans.
The Reds also had flank Ed Quirk (shoulder) and centre Anthony Fainga'a (facial cut) suffer injuries in the loss to the Rebels but Graham expects both to be fit.
The match was a good challenge for the Reds, who will face a physical force in their first match – the second round – of Super Rugby, against the Brumbies in Canberra next weekend.