Stephen Hendry follows Ronnie O'Sullivan out of Masters

Australian Robertson, last year's Crucible champion, recorded three breaks in the 80s as he kick-started his Wembley campaign with a comfortable win. He will face Ronnie O'Sullivan's conqueror, Mark Allen, in the next round.

Hendry took the first frame with a 74 break but Robertson levelled, clearing to the green after Hendry missed an easy pink and a similarly straightforward red in frame two. Hendry's long potting was letting him down, the same failing which saw him eliminated from last month's UK Championship by Mark Williams, but he set a good snooker to force a chance and took the frame with a fluent 64.

Robertson made harder work of a break of 85 in the next but nonetheless went to the interval level at 2-2. He resumed with an 86 to win the first frame back at one visit, and a clever safety left Hendry snookered on the yellow and allowed him to go 4-2 up.

An excellent run of 81 took him within one frame of victory and he led 38-0 in the next, but Hendry came back with 36 and 49 to cut the deficit to 5-3.

Robertson was not to be denied, though, and potted a good long red to begin a match-clinching break of 34. "It took a bit of time to get used to the table but towards the end I felt pretty good and made some good breaks," said Robertson. "I went 4-2 up and won the next with an 80-odd break. A 5-2 lead is pretty useful, and I potted a good last red and got the job done."

Looking ahead to the clash with Allen, Robertson said: "We've only played once or twice before, but he had a great win against Ronnie, he played pretty well and I'm sure it will be a great match."

O'Sullivan, meanwhile, vowed to prove his doubters wrong as he targeted more major trophies. The three-time former world champion has hit a sticky patch in his career, losing first-round matches at the UK Championship and Ladbrokes Mobile Masters and failing to land a ranking title since the Shanghai Masters in September 2009.

The slump has seen him tumble to ninth in the world, and has cast doubt on whether, at the age of 35, O'Sullivan can regain the form which made him the game's most feared player.

He has landed the Premier League and Power Snooker titles this season, but neither is a ranking-point event. "It hasn't been a disaster of a season, but I haven't quite done it in the two big major events, which is a little disappointing," O'Sullivan said. "I've got maybe four or five events left to play and I'd like to win one of them. There's no time to get lazy."