O'Sullivan loses 4-0 to Murphy at Champion of Champions

Seven-time world snooker champion Ronnie O'Sullivan was defeated 4-0 by Shaun Murphy at the Champion of Champions tournament, according to reports from both Yahoo Sports and BBC Sport.

O'Sullivan, who has been struggling with his form, was playing his first match since losing to Ka Wai Cheung at the Northern Ireland Open last month, as noted by both outlets.

Murphy took an early lead with a 68 break in the second frame, then secured the next frame with a 41 break. He won the fourth frame 61-42 to complete the 4-0 victory and advance to the last eight.

Murphy will face the winner of the other Group Three match between world champion Wu Yize and Chang Bingyu, according to the reports.