Tomlinson himself said he was doubtful two days earlier, and there's a growing expectation that the 2006 NFL MVP won't play because of a detached tendon in his groin.
"I'm going to hold out hope, but I don't know if that's realistic," San Diego coach Norv Turner said.
Tomlinson played just over a quarter in Saturday night's 23-17 overtime wild-card victory over the Indianapolis Colts before the injury forced him to the sideline after he scored on a 3-yard touchdown run.
Turner said there was no need to rule Tomlinson out before Sunday.
"I don't think we need to do that because he is feeling better, and if he gets up Sunday and he's feeling good, we may want him to be one of the 45," Turner said.
Copyright 2009 by The Associated Press