Former Tigers fly half Ian Humphreys is included in the replacements, alongside Italian International Carlo Del Fava.
Williams was bitterly disappointed with aspects of his side's performance in Cardiff but the Australian coach has moved on from that and today said:
"I know my team can win this game, we played some great rugby on Friday night in Cardiff and the players effort was spot on, if we can repeat that effort and style of rugby and control our penalty count then I am confident we can beat the Dragons"
"The Dragons will be nervous about coming to Ravenhill; they know how intimidating it can be to play at Ravenhill. But they will be sore from their defeat to Munster so we will be taking nothing for granted, we need this win and we are determined to get it" continued Williams.
Dragons Coach Head Coach Paul Turner is also keen to get a win and earlier this week said:
"Ravenhill is always an exciting and vibrant place to play and the boys are looking forward to heading to Belfast this weekend. The manner in which we leaked points last weekend against Munster was disappointing and this has been addressed in preparation for yet another away trip."
Both Ulster and the Dragons are yet to win a game in the League this season and will be battling hard for that coveted win bonus.
Ulster last played the Dragons at Ravenhill in February 2008. The game was Matt William's first game in charge and the Ulster men set Ravenhill alight by scoring six tries that night, with a superb display in front of the home crowd.
Ulster Captain Rory Best wants his side to replicate that win tomorrow night:
"That was a special night at Ravenhill and the players that played in that game who are playing tomorrow night want more of the same, the atmosphere at Ravenhill was electric and we know we can beat the Dragons if we put in a good performance."
Former Ulster Player Tommy Bowe was back in the province this week and was talking about how his new club Ospreys are envious of the special atmosphere at Ravenhill:
"People involved with the club or the supporters have asked how Ulster go about getting the sort of support they have. It is something the Ospreys would love to have and something they are struggling to get in many ways. And one of those reasons is because the Ulster supporters are so vocal and really get behind their team."
Supporters are reminded that the game will NOT BE TELEVISED ON SETANTA so if they want to watch their team live in action they should come along to Ravenhill. Tickets for the game are on sale now from Ravenhill, either over the counter Monday to Friday 9am to 5pm, by telephone 02890493222 Option 2 between 10 am and 12noon Monday to Friday or online at www.ulsterrugby.com You can also purchase tickets at one of our ticket outlets across the province which are listed below.
Ulster Team: (15-9) C Schifcofske; A Trimble, D Cave, R Dewey, T Nagusa; N O'Connor, l Boss; (1-8) T Court; R Best(Capt), B Botha, R Caldwell, E O'Donoghue, M McCullough, K Dawson, R Diack
Replacements: (16-22) N Brady, J Fitzpatrick, C Del Fava, T Anderson, C Willis, I Humphreys, B Cunningham