The Premier League roadshow moves into Doncaster tonight as four more world class players scramble for points.

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The star attraction Ronnie O'Sullivan returns, as he faces week one winner Matthew Stevens in the opening game of the night.

The rocket has been in indifferent form of late; he lost out to Shaun Murphy 3-2 in his opening game of the season and has since suffered numerous shock defeats in ranking events, including to Anthony Hamilton in Shanghai and Peter Lines at the PTC 5.

He is focusing his attention on the Premier League this week however, after opting out of the trip to Poland for PTC 6.

Stevens will be looking to maintain his 100% start to the league season, having won both of his games 3-0.

O'Sullivan is the odds on 2/5 favourite with Bet365, with Stevens a realistic 7/4 chance with the same bookmaker.

The Dragon Ding Junhui takes on Ali Carter in the second semi-final at 9pm.

Ding produced some fine Snooker en route to last week's final, but failed to see off a classy Neil Robertson on that occasion.

Carter has suffered a drop in from lately, partly due to ongoing health problems. He will be looking to bounce back from first round exits in both ranking events so far with a with to kick off his 2011 Premier League campaign.

Ding's recent good form is reflected in his short 1/2 price with Bet365, as opposed to Carter at 6/4.

O'Sullivan's superb track record in the Premier League sees him placed at 13/10 favourite to win week 4 with Victor Chandler, with second favourite Ding best priced 12/5 with Bet365.

Boylesports are offering a 6/1 enhanced rags double for both outsiders Stevens and Carter to win their games. 

Ding Junhui secured numerous high breaks last week and in the recent PTC event and is 5/2 to take the £1,000 high break prize tonight with Sky Bet.

Action gets underway from 7:30pm from the Doncaster Dome with all matches streamed live over the best of five frames with a 20 second shot clock in operation.

Premier League Snooker Week four fixtures and schedule:

7:45pm

Ronnie O'Sullivan v Matthew Stevens

9.00pm

Ding Junhui v Ali Carter

10:15pm

Final