The 49ers will no longer be facing the Cincinnati Bengals on Sunday Night Football on Dec. 20.

The NFL announced on Monday flexible scheduling changes for Week 15. The Arizona Cardinals at Philadelphia Eagles game on Sunday, Dec. 20 moves to NBC Sunday Night Football at 5:30pm PT, with the Cincinnati Bengals at San Francisco 49ers game moving to CBS at 1:25pm PT.

With the move, the 49ers and Raiders will be going head-to-head. The Raiders kick off against the Packers at 1:05pm PT.

Additionally, the Week 15 Buffalo Bills at Washington Redskins game at 10:00 AM PT moves from CBS to FOX.

The NFL uses “flexible scheduling” on Sundays in Weeks 11-17. Flexible scheduling ensures quality matchups in all NFL Sunday time slots in those weeks and gives teams a chance to play their way onto primetime and into the late-afternoon 1:25 PM PT time slot on CBS or FOX.

For each flexible scheduling week with the exception of Week 17, the NFL announces the start times of games on Sundays no later than 12 days prior to that weekend. To ensure a Sunday night game and doubleheader games with playoff implications in Week 17, flexible scheduling decisions for that Sunday can be made on six days notice.

NFL media services contributed to this report