The Tennessee Titans face the San Francisco 49ers this Sunday in a highly anticipated Week 15 NFL matchup. Here's a breakdown of six crucial details fans need to know before kickoff.

First, the game is scheduled for Sunday, December 17th. While the specific time hasn't been explicitly stated in the provided information, it's a standard NFL Sunday game time. The location is also not mentioned, but NFL games of this nature are typically played at the home stadium of one of the teams involved.

Second, the matchup represents a significant challenge for the Titans. The 49ers are considered a strong contender in the NFC, and the Titans will need a focused effort to secure a victory. The outcome of this game could have implications for both teams' playoff hopes.

Third, this Week 15 contest is part of the ongoing NFL season. The Titans and 49ers have already played several games this season, and their records leading up to this game will influence the dynamics of the matchup. Details of those records are not included.

Fourth, the "six things to know" aspect suggests a deeper dive into team strategies, player matchups, or recent performance trends. However, without further specifics, we can only highlight the general importance of understanding these factors for any NFL game.

Fifth, the game will be of interest to fans of both the Titans and the 49ers, as well as to broader NFL enthusiasts. The potential for a close and competitive game makes it an attractive viewing option.

Finally, the Week 15 designation places this game within a critical point of the NFL season, where teams are battling for playoff positioning and seeding. Every game carries increased weight as the regular season nears its conclusion.