ESPN has released its NFL Power Rankings for Week 1, and the San Francisco 49ers have landed the No. 4 spot.

The Niners, who open the season with a tough matchup against NFC powerhouse Green Bay Packers (ranked No. 1 in ESPN's poll), moved up one spot from last week's preseason edition of the Power Rankings. They'll open the season with three of their first four games on the road before returning to the West Coast to play five of six at home, beginning in early October with a Week 5 matchup against the Buffalo Bills.

The rest of the NFC West didn't fare so well in the Week 1 poll. The Seattle Seahawks claimed the No. 20 spot, the Arizona Cardinals sit at No. 23 and the St. Louis Rams are ranked 28th.

Sunday's game against the Packers will begin at 1:25 p.m. PDT and be televised on Fox.

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