Cahill caused one of the biggest upsets in the history of the World Championship when he beat Ronnie O’Sullivan 10-8 in the first round at the Crucible in 2019.
He was the first amateur ever to play at the Crucible having come through the qualifying rounds, and he stunned world number one and five-time World Champion O’Sullivan with a superb performance.
In the last 16 in Sheffield he faced Stephen Maguire, and suffered an agonising 13-12 defeat, having led 12-11.
Cahill had won three matches just to qualify for the Crucible, beating Andrew Higginson, Michael Holt and Michael Judge. Those results meant he finished high enough on the one-year ranking list to earn a two-year card to the pro tour from 2019 .
Even before beating O’Sullivan, he was no stranger to getting the better of the top names on the big stage. In 2014 he knocked Ding Junhui out of the UK Championship, and in 2018 at the same event he beat Mark Selby, then ranked number one in the world. Cahill saw off Selby 6-3 before losing in the last 64 against Sunny Akani. He has also scored wins over Neil Robertson and John Higgins.
The Blackpool potter first turned pro in 2013 and has reached the last 16 of three ranking events.
He comes from a snooker background as his mum Maria was a leading ladies player, and her sister Mandy was married to seven-time World Champion Stephen Hendry.