The Swansea City goalkeeper said that he thought the effort had crossed the line for a goal which would have given the home side the victory that they wanted.
But Lee Mason ruled that there was no goal and the Swans earned a third consecutive draw in the league to maintain their 9th placed position in the league.
Speaking to the Western Mail, De Vries said โI have to be honest, I thought it had crossed the line
โI havenโt seen it back and I certainly didnโt know it for sure but my instinct at the time was that it did.
โIt was a messy one because I think it touched Angel Rangel, touched me, went through the legs of Ashley Williams and I think it crossed.
โBut I certainly didnโt know for sure because I was on the line before Ash got there and in a split second the ball was gone.
โWho knows, but we can have a bit of luck in that respect when you look at some of the goals that have gone against us โ even the penalty that Cardiff had last week. We deserved this clean sheet.
โItโs part of the job of making saves and of course itโs nice to be back from quite a nasty injury,โ he said. โIt was only my third game back since it happened but I feel Iโm getting more confidence with every game I play.
โThe first one definitely came off Tatey with his first touch! It was a nasty one because those free-kicks are so hard to judge when they whip them in and all you can do is be ready to make a reaction save should anyone get a touch.
โNow Iโm looking forward to getting rid of the mask on Tuesday โ I donโt think itโs lucky because Iโm not superstitious but I will keep it as a memento!โ