On 18 February 2007, Tabb became the first woman to officiate at a ranking event final. She took charge as Neil Robertson defeated Andrew Higginson 9–8 in the Welsh Open. On 20 January 2008, she refereed her first Triple Crown final at the 2008 Masters, which was held at the Wembley Arena in London and saw Mark Selby defeat Stephen Lee 10–3. On 5 April 2009, she took charge of the China Open final in Beijing, where Peter Ebdon beat John Higgins 10–8.