"The result last weekend has put is back in the title race. Now we have to do well against Celta. We can't afford let ourselves down," he told reporters at a press conference.
"Our desire is to perform at the highest level and put in similar performances to last weekend. All the competitions are at their final stage now and if we don't perform like last weekend, we risk losing out on trophies.
"The issue is consistency, generally. That's why we're not where we want to be. If we had been consistent in our performances we would be in a much better position."
Barcelona were 4-3 winners over Real Madrid in El Clasico at the weekend.