Scott Dureau declared himself fine after a health scare in the Catalan Dragons' 32-32 draw with the Widnes Vikings.
Dureau is only just back playing after having a tumour removed from the back of his eye earlier this year and there were worries he had suffered a setback during Sunday's match.
After taking a knock, Dureau sat on the ground when he was unable to see the target of the posts and then, when he tried to stand, fell back to the floor.
But a visit to nearby Whiston Hospital showed nothing serious, and a club spokesman said: "Scott suffered mild discomfort and was forced to prematurely leave team-mates this afternoon.
"He went to hospital where he underwent a number of tests. The first reviews are reassuring but he will undergo further tests on his return to France."
On the result, coach Laurent Frayssinous added: "I'm not happy with the boys. We didn't respect the ball.
"I'm not happy as we didn't do the right things. But credit to Widnes they stuck in there. We didn't play as well as we could. We could have lost but we got a draw. It could be worse but I'm not happy."
Vikings boss Denis Betts said: "I thought it was a point lost. We are really disappointed we switched off at times, particularly at dummy half on the edges.
"The tries they scored from kicks and dummy half - these are the things you can forgive. They are a team with real quality but we got ourselves in a position to win and then went soft."