Reversed shirts, a gesture for Leo, Sevilla's Butterfly Skin talisman

Sevilla players wore reversed shirts during training to raise awareness of Butterfly Skin disease, visited by 12-year-old Leo, the team's good-luck charm.

Sevilla marked International Butterfly Skin Day by wearing reversed shirts during training ahead of Monday's match against Osasuna, in a gesture of solidarity with patients of the rare genetic disorder. The club was visited by Leo, a 12-year-old patient from Seville's Virgen del Rocío hospital who has become the team's talisman — Sevilla has won every match he has attended in the dressing room.

Players wore their shirts inside-out because the friction from seams and labels causes painful wounds and blisters for those with Butterfly Skin, a condition with no cure. Leo, who has brought the disease's name to the European Parliament to push for regulated treatment access, explained the gesture to his Sevilla friends. Manager Luis García Plaza and the squad have become close with Leo through regular visits to training and matches.

"They told me I'm a machine. The coach didn't expect it," Leo said after meeting his idols. He has noticed significant improvement since beginning treatment in Andalusia, where regional authorities approved the costly therapy: "It's changed everything. My wounds are much better. Thank you all for being with us, we'll keep fighting."