Jubb won the singles title at the 2019 NCAA Division I Men's Tennis Championship as a member of the South Carolina Gamecocks.

At the age of four Jubb was spotted playing tennis at Pickering Park near his home in Hull.

Carmichael coached Jubb into his teenage years where he trained at the LTA-accredited Nuffield Health Tennis Academy in Hull.

[5] He made his ATP Tour debut at the 2019 Eastbourne International by winning two qualifying matches, before losing in the first round to eventual champion Taylor Fritz.

[6][7] Jubb also received a wildcard for the 2022 Wimbledon Championships but lost in five sets to eventual finalist Nick Kyrgios in the first round.