Britain's Olympic chief believes Japan will shoot up the medal table when it hosts the 2020 Summer Games in Tokyo, making it difficult for his own team to continue its rise.
Great Britain became the first nation to increase its medal haul at the Summer Olympics following the edition it hosted, when it won 67 medals at the 2016 Rio de Janeiro Games compared with 65 at the 2012 London Games.
But Sir Hugh Robertson, chairman of the British Olympic Association, says it will be very difficult for Team GB to improve yet again in Tokyo next year — in part because he expects Japan to perform so well.