Allen was pulled out of his fight at the end of the 10th round having been dominated by Price from the start of the contest.
The 27-year-old was given oxygen after the final bell but was carried out of the ring on a stretcher and rushed to hospital.
Former middleweight champion Darren Barker, now Allen’s trainer, has since reassured fans his fighter is ‘ok’, also congratulating veteran Price on his near punch-perfect performance.
Dave wants you to know he’s ok. He’s just waiting on a scan and a few stitches. He also wants to congratulate @DavidPrice_1 on a fantastic win and hopes everyone gets home safely. pic.twitter.com/65vQun8XiW— Darren Barker (@DarrenBarker82)July 20, 2019
“Dave wants you to know he is ok,” Barker wrote on Twitter, alongside a picture of Allen in hospital giving a thumbs up.
“He is just waiting on a scan an a few stitches. He also wants to congratulate David Price on a fantastic win and hopes everyone gets home safely.”
The hugely likeable Allen had previously been on a four-fight winning streak, stopping former world champion Lucas Browne with devastating body shot back in April.