Vorm has admitted he is worried about the impact of Williams' injury problems on Swansea's form in Europe and the Premier League.
He said: "Ash is a leader, of the team, of the group, on the pitch and of the pitch. It's hard when he's missing.
"We talk a lot and for me, he is one of the best in the Premier League. With Chico (Flores, Williams' partner in central defence) it's different because he doesn't speak that good English. Jordi Amat hasn't played that many games yet, he is young and has to focus on his own game.
"Ash talks a lot and leads with his own performance. But he is injured and we have to cope with it."
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