New Orleans outplayed Zimmer's team badly in the second half of the NFC Championship Game, wiping out a 17-0 deficit to take two different leads late in the game. Drew Brees was particularly brilliant in the second half, generating 177 yards, three TDs and completing 17-of-22 passes.
Zimmer knows his defense must improve Sunday night to slow down the future Hall of Fame quarterback.
"I was watching tape, and I'm like, how old is this guy?" Zimmer said of the 39-year-old Brees.
Brees this season picked up where he left off in Minnesota, generating an NFL-high 77.3 completion percentage and 121.6 passer rating to go along with 13 TDs to 0 INTs.