After their victory over both the Packers and the winter elements of Green Bay, Wis., Sunday, the 49ers are understandably riding high.But if they want to return to the Super Bowl, their next two opponents will be tough to beat. In fact, they will have to go through teams that already have beaten them this season.First up are the Carolina Panthers this Sunday at Bank of America Stadium in Charlotte, N.C. The Panthers are the No. 2 seed in the NFC tournament and defeated the 49ers at Candlestick Park in early November, 10-9.Should the Niners get past the Panthers, they'd face either the No. 1 seeded Seahawks in Seattle – where San Francisco was dominated in a 29-3 loss Sept. 15 – or the sixth-seeded Saints. The 49ers would host the Saints, but New Orleans defeated them 23-20 on Nov. 17 – the last time the Niners lost a game. Since that defeat at the Superdome, San Francisco has won seven straight games, including the playoff victory at Green Bay.But first, the 49ers would need to win this Sunday.Oddsmakers have made the 49ers 1- to 2-point favorites for Sunday's game against the Panthers, despite Carolina's earlier victory. But the 49ers are a hot team that is...