By ESPNSTAR.com staff
Van Persie has been one of the signings of the season so far; the Dutch international, who joined the Red Devils from Arsenal during the summer for £24 million, already has 12 goals and five assists to his name in the Premier League this season, and was once again instrumental in his side's 3-1 win over Sunderland over the weekend.
The 29-year-old's sensational performances have helped propel United to the top of the table on 42 points, six points ahead of nearest challengers Manchester City, and Sir Alex Ferguson's men are already considered favourites to win the title this season.
However, United and Van Persie will face a stern test when they travel to the Liberty Stadium to take on Swansea, who lost 1-0 to Tottenham Hotspur over the weekend, in their next Premier League fixture.
And Williams, one of the standout performers in the Swans clash with the Lilywhites, claimed that his side have devised a plan to stop Van Persie from doing too much damage.
"Van Persie's on fire at the minute and playing with a lot of confidence so we just have to work to stop him and stop the service into him," Williams was quoted as saying by the Mirror.
"He's going to get a couple of chances, that's just the way it goes against a quality team, but I think we have to dominate possession and starve them.
"He's definitely one of the best strikers in the Premier League if not the best.
"He's a good player, technically he's very good and you can all see his goalscoring abilities.
"He's a complete player and was one of the best strikers I played against last season.
"You watch Manchester United so many times so you know what they're all about - trying to stop them is just a different thing."
The last time both teams met at the Liberty Stadium, United ran out 1-0 winners courtesy of a goal by Javier Hernandez, but Williams promised that things would be different this time around and declared that his side would not hold back against the Red Devils.
"It was true that we showed them too much respect last season," Williams mused.
"We sat back too much in that first half and then really got at them.
"We deserved a draw at least in that game. Scotty (Sinclair) missed a chance, an open goal, and they had one chance.
"But this season, I think you can see, we've got a lot more belief. We don't really fear anyone.
"We're at home and we've lost two on the bounce so it would be great going into Christmas to get a positive result."
Van Persie was voted Man-of-the-Match in United's win over Sunderland by the club's fans.