Tokyo 2020 Olympics - 'It's unbelievable!' - Team GB's Matt Walls reacts to stunning gold medal in omnium

Tokyo 2020 Olympics - 'It's unbelievable!' - Team GB's Matt Walls reacts to his quite stunning gold medal in the omnium after he dominated the event. Watch every unmissable moment live from Tokyo 2020 across Eurosport, the Eurosport app and discovery+. Download the Eurosport app for iOS and Android now.