Alun Wyn Jones can make a fifth World Cup says Wales’s Jonathan Humphreys

• Captain ‘has such an influence on teams’ says forwards coach• Jamie Roberts to leave bath and join Stormers in South AfricaAlun Wyn Jones will turn 38 when the 2023 World Cup starts, but Jonathan Humphreys expects the Wales captain to be competing in what would be a record-equalling fifth tournament.Humphreys, the Wales forwards coach, was filling the same role at the Ospreys when the Lions second row Jones started his regional career in 2006. He remained with the Swansea-based side until 2013 when he became part of Scotland’s management team and became part of Wales’s set-up after last year…