The Sweden striker hit the ground running after moving from Inter Milan in the close season, quickly notching 11 league goals.
Ibrahimovic, though, has only found the net once in their last nine matches in all competitions.
"He's already scored a load of goals in the league so it's no problem if he goes a few games without scoring," team mate Seydou Keita told reporters.
"If he doesn't score there are others who will because we are a team so we aren't worried."
Visitors Getafe have proved awkward opponents for Barca, drawing their last two visits to the Nou Camp, but arrive distracted by a King's Cup semi-final.
La Liga's seventh-placed side lost the first leg 2-0 at Sevilla on Wednesday and have promised to go all out for their third final appearance in four years, in next week's return leg.
"It won't be easy but we aren't calling it quits," coach Michel told reporters. "We are at home and this should help us to try and turn it round."
Unbeaten Barca lead Real Madrid by five points, with Manuel Pellegrini's side welcoming struggling Espanyol to the Bernabeu on Saturday.
Onesimo has a tough task to fire Valladolid's climb away from the relegation places at the Mestalla. His club have taken only two points from five games.
