The Swansea City goalkeeper was furious at the last gasp equaliser that robbed the team of a victory on Saturday and dropped them out of the play off positions in the process.
Lee Trundle’s own stoppage time goal had appeared to have given the Swans a hard earned three points but the late lapse meant it was not to be.
And De Vries believes that it was a lack of maturity that cost them the goal.
โAs a group it shows we still need to mature a bit more,โ he told the Western Mail. โWhen you score an injury-time goal to take the lead in a game like this, you need to kill the game off.
โWe should have been more aware of the dangers. All you need to do is keep the ball in the corners and waste a bit of time.
โIt probably wasnโt a good idea for that many players to go forwards, but thatโs just the nature of this team. We are attacking-minded and we all like to get on the ball.
โWe just need to grow up a bit, though. This will be a vital lesson in that respect and the gaffer has already told us we need to learn from it.
โIt feels like a loss because, when Trunds scored his second in injury time, I thought we would nick it and get all three points. But then their second goal was unbelievable.
โWe were defending it with four guys, but my touch took it away from them. Ash then slipped at the wrong time and we were just really unlucky.
โThere was nothing else we could do about it. The luck just wasnโt with us.โ