Williams has hailed the Dutch shot-stopper's reliability, going so far as to rate him as the best in the division.
"You've only got to look at the saves he has pulled off this season to see how valuable he has been for us," Williams told the South Wales Evening Post.
"There are a number of quality keepers in this league, but he is the best in my opinion.
"He is like an extra outfield player to us because of his footballing ability - he is one of our best passers. You couldn't have asked for more from Dorus this season."
Source: Team Talk
Source: Team Talk