The 2015 Welsh Open was a professional ranking snooker tournament held at the Motorpoint Arena in Cardiff from 16 to 22 February 2015. The tournament was staged in Cardiff for the first time since 2004, having moved from Newport.

Ronald Antonio O'Sullivan is an English professional snooker player. Widely recognised as one of the most talented and accomplished players in snooker history, he has won the World Snooker Championship seven times, a modern-era record he holds jointly with Stephen Hendry. He has also won a record eight Masters titles and a record eight UK Championship titles for a total of 23 Triple Crown titles, the most achieved by any player. He holds the record for the most ranking titles, with 41, and has held the top ranking position multiple times.