“I have only been able train for three hours since December 15,” the 25-year-old Belgian told La Derniere Heure.
The problem first started at the team's training camp in Calpe last month. “The pain is so bad that I can't work out.”
No one is sure what the problem is. “I have undergone many tests, but the doctors can't find the cause,” he said. “I'm getting really worried.”