Bayern Munich and France winger Kingsley Coman could bring a premature end to his football career if his ankle injuries persist.
Still just 22, Coman is regarded as one of the most promising young players in the world, but fitness problems have severely restricted him in recent years.
This term he has made just three appearances for Bayern in the Bundesliga, while he managed only 21 last season and 19 the campaign before.
The former Paris Saint-Germain and Juventus winger featured in Bayern's two most recent league outings after over three months out with damaged ankle ligaments, a recurrence of an issue which saw him miss a similar amount of time towards the end of last season.
He also suffered injuries during the 2016/17 season that saw him miss nearly three months of the campaign, including torn knee ligaments and serious ankle problems.
His patience is starting to wear thin and another comparable injury could see him call it quits despite his young age.
"It was a very difficult year," Coman told TF1. "When I hurt myself, it was the end of the world for me.
"I hope I don't have to relive what I've been through, enough is enough. I will not accept a third operation – it will mean maybe my foot is not made for this level.
"I will then lead another life, an anonymous life."
Losing Coman would be a blow for a Bayern outfit set to lose veteran winger Arjen Robben at the end of the season upon the expiry of his contract, while Franck Ribery is 35 years old.
Coman and Bayern face Ajax next in their crunch Champions League tie. Ajax need to win to secure top spot in the group, while Bayern will qualify first with a draw or a win.
Following that game, they travel to Hannover in domestic action as they attempt to close the nine-point gap between them and Bundesliga leaders Borussia Dortmund.