Judd Trump has work to do to be considered one of snooker's greats, according to legend Ronnie O'Sullivan.
Trump, 30, who kicks off his campaign at the 2019 UK Championship on Sunday against China's Mei Xi Wen, has been in imperious form this season following his maiden World Championship title victory in May.
The Bristolian has won three ranking titles already this season and will be hoping to join O'Sullivan safely into round three.
"Judd is a fantastic player and a great talent but the true test is doing it over 10-15 years," O'Sullivan said.
O'Sullivan said 30-year-old Trump's CV does not compare to his or that of Stephen Hendry, Steve Davis, John Higgins or Ray Reardon - who are all multiple ranking event winners.