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Elise Amendola, Associated Press
New England Patriots tight end Rob Gronkowski spikes the ball after his touchdown against the Buffalo Bills in the third quarter of an NFL football game in Foxborough, Mass., Sunday Jan. 1, 2012.

FOXBOROUGH, Mass. — The New England Patriots have won eight straight games and have the top seed in the AFC. And there are still plenty of things they can do better.

Coach Bill Belichick said Monday they'll use this bye week to work on those before finding out next weekend who their first playoff opponent will be. Two big concerns are the slow starts they've had in their last two games and a defense that continues to give up big chunks of yardage.

The Patriots fell behind the Buffalo Bills 21-0 on Sunday before coming back for a 49-21 win. In their previous game, the Patriots beat the Miami Dolphins 27-24 after trailing 17-0.

But their 13-3 record is the best in the AFC, which gives them home-field advantage throughout the conference playoffs.