Ding Junhui defeated mentor Ronnie O'Sullivan 6-0 to go through to the semi-final of the Cazoo UK championship at the Barbican in York on Friday afternoon.
After two tight and tense opening frames which went the way of the Chinese player, Ding never looked back and went on to win the next four, including a wonderful break of 131 to clinch the victory.
Ding won the tournament back in 2019 when he saw off O'Sullivan on route to the title.
It is O'Sullivan's first whitewash since being defeated 5-0 to Iranian player Hossein Vafaei in qualifying for the German Masters last year.
In the previous round O'Sullivan had beaten Zhou Yuelong by six frames to nil.
This is also the first time the seven-time world champion has been whitewashed in a Triple Crown event. The first event he attended was back in 1992.
The 46-year-old, who has also won the UK title seven times, said: "It's great to see Ding play well. He's a class act.
"Afterwards I just said to him 'you played great, go and win it, get the job done.' I think we're all Ding fans.
"Some days you play and it goes great and some days it doesn't. It was just one of those days, what can you do? Thirty years I've been at this game, I've taken a few knocks along the way."
Ding will play Tom Ford in Saturday afternoon's semi-final after the world number 32 beat Joe Perry 6-4 in his quarter-final.
Jack Lisowski, who reached this stage in the previous two years, produced one of the performances of his career to beat former world champion Shaun Murphy 6-1.
The 31-year-old made a record-equalling four consecutive centuries to progress to his first Triple Crown event semi-final, where he will face Northern Ireland Open champion Mark Allen, who came from 4-2 down to beat Sam Craigie 6-4.
