The centre-forward was withdrawn midway through the second-half of United’s final preseason friendly, after replacing Oli McBurnie during the interval.
Describing the decision to substitute Mousset as a “precautionary measure”, Wilder predicted the injury he suffered will not prevent him reporting for duty on Monday - when United hope to apply the finishing touches to deals for two international players.
“Lys should be okay to train,” Wilder said. “I don’t see any reason why he won’t be.”
Despite concerns about his conditioning after spending much of the summer at home in France, Mousset is scheduled to perform a key role when United begin preparing for their opening match of the new Premier League campaign - against Wolverhampton Wanderers in nine days time. With McBurnie continuing to require treatment to heal a foot laceration and David McGoldrick and Callum Robinson absent because of their Republic of Ireland commitments, United will have only three strikers at their disposal for their next two training sessions.
“Lys got a whack on the top of his toe,” Wilder explained. “With these modern boots offering so little protection, it can be quite painful.”
“We took him off as a precautionary measure,” he added. “He felt it so we did what we did. Lys will be back in with us next week, I don’t see any reason why he won’t be.”