The youngster opened the scoring against the Premier League champions with a sensational solo effort, but limped off after 63 minutes after tweaking his ankle.
Man United visit AFC Bournemouth for their first game of the 2016/17 campaign this Sunday.
Speaking after the game, Mourinho claimed that Lingard’s injury will not preclude him from featuring against Eddie Howe’s side this weekend.
“I think Lingard must not have anything really serious so we are in good condition to work but of course there is a long way to go,” he said.
Once again, Lingard was a tireless, indomitable force on the right hand side against Leicester. The youngster’s immense discipline and ability to keep the ball moving was what cemented his status in the starting XI under van Gaal.
But with Mourinho at the helm, United fans saw another string to Lingard’s bow: with Leicester threatening to counter, the 23-year-old snatched the ball, burst past two bewildered defenders, flew past another, and then another, before cooly sweeping home.
That direct style, packed with confidence and expression, was strictly prohibited by van Gaal, and it meant that young talents like Lingard were precluded from fully expressing themselves. His goal was a symbol of a new order under the Portuguese – an ethos that encourages expression and arrogance. United fans will hope to see more of the same on Sunday.