Lenoir sustained a foot injury during Sunday's 38-17 win against Las Vegas.
Lenoir notched three solo tackles, one of which was for a loss, in the contest, but he didn't leave unscathed. Head coach Kyle Shanahan explained after the game that the cornerback hasn't been ruled out for Week 10, suggesting that Lenoir may have avoided a major injury. If he is forced to miss any action moving forward, Ashtyn Davis and Ephesians Prysock are both candidates to see increased workload in the secondary.