Robertson into last 16 at the English Open

Neil Robertson has rattled off another two century breaks en route to reaching the last 16 of the English Open but world champion Ronnie O'Sullivan is out.

Neil Robertson has continued his impressive progress at the English Open snooker championship, rattling off another two century breaks en route to defeating Englishman Mark Davis 4-1 in the third round.

Yet while the left-hander from Melbourne has moved smoothly into the last 16, world champion Ronnie O'Sullivan crashed out after a comprehensive 4-1 defeat by former world finalist Matthew Stevens.

Robertson had found his normal fluent game stifled by Mark Joyce's fine safety play in the previous round but as soon as the Australian had opened up with a half-century break in the opening frame against Davis on Thursday, his 48-year-old opponent was on the back foot.

In the second frame, world No.3 Robertson compiled a 119 break, his third century of the tournament, and after another fine run of 77, wrapped up proceedings with a fourth ton, 117.

The sensation of the tournament came as the 43-year-old Welshman Stevens wrapped up a victory over six-times world champion O'Sullivan with a break of 116.

It was a further setback for the 'Rocket' since he regained his global crown in August, having also exited at the first round stage of the European Masters.

Stevens, a two-time world finalist who won his solitary ranking title in 2003, was due to return later on Thursday for a last-16 match against Jak Jones, while Robertson was set to play Barry Hawkins for a place in the quarter-finals.