Switzerland goalkeepers spotted using 'secret weapon' in training as they prepare to take on Harry Kane and England at Euro 2024

First-choice 'keeper Yann Sommer was spotted wearing a pair of dark sunglasses in training. The thought that he was simply trying to protect his eyes from the sun was quashed, though, when Sommer's backup Gregor Kobel was also seen wearing the glasses.

There's more to it than avoiding the glare from the sun. According to The Sun, the special battery-powered glasses can create a slow-motion effect when a ball is struck, and can help goalies improve their anticipation. They appear to be working, too. Switzerland have only conceded three goals so far at the Euros and kept a clean-sheet in their last-16 win over Italy.

Sommer and Switzerland's 'keepers also donned the futuristic shades at Euro 2020. The glasses, produced by Japanese company VisionUp and costing upwards of £350, have also been used by tennis and baseball players.

Switzerland have the chance to reach the semi-finals of a European Championship for the first time in their history when they take on England in Dusseldorf on Saturday. Murat Yakin's side will enter the tie full of confidence following impressive displays against Germany and Italy.