Youngster Bailey Peacock-Farrell filled in for the Italian in midweek.
Silvestri was sent off for giving away the penalty from which Rotherham United scored their winner in Saturday's derby at the New York Stadium, and missed Tuesday's draw with Queens Park Rangers as a result.
With Ross Turnbull out for the season, Evans turned to Peacock-Farrell, whose performances for the Under-21s had earned him rave reviews.
Evans previously stated his intention to give the 19-year-old a run out before the end of the campaign and insists his premature bow won't prevent him appearing again this term.
Asked if Leeds will give Peacock-Farrell another chance to impress, the Whites chief told the Yorkshire Evening Post: “Most certainly we will.
“We’ve got a top goalkeeper in Marco and we know that. Bailey’s a goalkeeper who’ll play for Leeds in the future and we’ll pick another game or two as we go forward but it’s quite clear here that Marco Silvestri is our number one.”
Evans added of Peacock-Farrell: “He’s a young man who’ll play a lot more games. He’s come in, he’s done what was expected of him and what I thought he would do.”
Leeds face a difficult trip to league leaders Burnley on Saturday, requiring another eight points from their remaining six matches to absolutely guarantee their safety.
The White still have top-half sides Birmingham City, Hull City, Wolverhampton Wanderers and Preston North End to play, with a favourable home tie against Charlton Athletic making up their run-in.
You would suspect the Addicks' visit is one of the fixtures being earmarked for Peacock-Farrell to feature in.