The secret behind Yann Sommer's penalty heroics for Switzerland in their European Championship upset of world champions France might just be a pair of performing-enhancing sunglasses.
Swiss goalkeepers Yann Sommer, Jonas Omlin, Gregor Kobel and Yvon Mvogo have all been spotted wearing the VisionUp glasses in a number of training sessions during the tournament.
The battery-powered eyewear, created by Japanese company VisionUp, has an adjustable shutter speed which helps improve brain processing speed and visual ability.
Basically, the glasses create a slow-mo effect to improve a wide array of visual skills - and it's clearly working for the likes of Sommer, who has been outstanding throughout this summer's tournament.
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The VisionUp website says: "You can easily improve brain processing speed and visual ability, such as kinetic visual acuity, dynamic visual acuity, peripheral vision, depth perception and hand-eye coordination,"
"You can thus obtain better athletic performance. VisionUp are useful not only to athletes but also young or elderly people."
You can see a clip of Sommer and his Swiss teammates using the glasses below in a fascinating training session.
Sommer produced a superb diving save to deny Kylian Mbappe in a tense penalty shootout as the Swiss overcome the odds to beat tournament favourites France.
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Vladimir Petkovic's side, who managed to progress from Group A after picking up four points against Wales and Turkey, will now play Spain in a historic quarter-final clash on Friday at 5pm.
Do you think they can do it again?
Let us know in the comments.
Featured Image Credit: VLADIATOR/YouTubeTopics: Football, Kylian Mbappe, Spain, France, Switzerland
