Diego Costa will have a checkup with Wolves on Tuesday.
It is more than likely that Costa will be offered a contract by Wolves if he passes his medical, as they look to replace the injured Sasa Kalajdzic.
Bruno Lage's side are able to sign Costa outside of the transfer window.
Wolves had been looking for a new forward since the start of the summer and thought they had found the one when they signed Kalajdzic.
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Wolves confirmed on Sunday that the 6ft 7in forward had picked up a long term injury during his debut against Saints.
It was a double blow for Wolves on Saturday, with Lage losing his top scorer in the warm-up, and the Mexican having on-and-off injuries since the start of pre-season.
asa felt a pain in his knee at the end of the first half He will see a knee specialist on Monday after scans revealed an anterior cruciate injury. Further updates will follow, and we now need to support him in his recovery.
Rael's pre-season was interrupted by a knee injury, which means that he is still building his resilience and his ability to recover quickly during periods of match congestion."
He felt a pain in his groin during the warm-up and we didn't want to put him at increased risk of injury, so we gave him a few more days to recuperate.
Costa spent three-and-a-half years at Atleti Madrid, scoring 19 goals in 81 matches before his contract was terminated in December 2020.
His contract was terminated in January of this year after he scored five times in 19 games for the club.
Costa has been out of football for the last eight months but could return to the top flight if his trial is a success.