Leeds managed to get past Salford with a 3-0 victory, but Casilla did not always look comfortable.
The Spanish goalkeeper had a few nervy moments throughout the contest.
And Neville said: “He parries two back in towards his own penalty spot. I’d be a nervous wreck playing with him. That’s the first time I’ve seen him live tonight. He made some good saves but…”
Former Leeds goalkeeper Paul Robinson, who was also working as a pundit last night, also felt that Casilla looked nervy.
And Robinson has questioned whether Casilla has done too much work on improving his weaknesses on the training ground.
“Goalkeeping wise his saves were excellent,” Robinson explained.
“But again he’s struggled with the ball coming into his box. I know it’s something they’ve worked on but I think maybe they’ve worked on it too much because it’s in his head.”
Casilla has plenty of doubters to win over at Leeds, after a shaky first few months in English football.
However, Marcelo Bielsa appears to be a big fan of the Spaniard, who is always pro-active in his approach.
Leeds’ win over Salford has seen them progress to the second round of the Carabao Cup, where they will face Stoke City.
Have something to tell us about this article?