World number 11 Holger Rune became the latest high-profile tennis player to have his season ended prematurely after suffering an injury at the Nordic Open in Stockholm.
The Danish 22-year-old, set to return to the top 10 after reaching the semi-finals at the ATP 250 event, was forced to retire when leading Frenchman Ugo Humbert by a set.
His mother, Aneke Rune, later told Danish newspaper BT that she had been informed by medical staff that her son's injury was "very bad".
She said: "They are completely sure that it is a torn Achilles tendon, so it's of course very bad.