 Complete the following phrase:  Cumming joined Chelsea at the age of eight, enrolling in the clubs development programme. He progressed through the various age groups at Chelsea and became the under-17 teams first-choice goalkeeper at the start of the 201718 season. That season, he played twice for the clubs under-21 team in the EFL Trophy, making his debut in a 22 draw away to Plymouth Argyle on 15 August 2017.ref nameGames played by Jamie Cumming in 20172018ref Cumming also featured regularly for the clubs under-19 team that season; saving three penalties in the clubs UEFA Youth League semi-final penalty shoot-out victory over Porto on 20 April 2018. He signed a professional contract with Chelsea in November 2018, keeping him contracted to the club until the end of the 202021 season. Cumming played eleven times for the under-21 team in EFL Trophy matches over the next three seasons.ref nameGames played by Jamie Cumming in 20182019refref nameGames played by Jamie Cumming in 20192020ref Cumming was named on the substitutes bench for Chelseas 41 