Callejon was a starter and scored again against Sevilla.
"We have to be in top form always for the coach. We achieved our goal tonight, which is what matters. We're leaders," he said.
"The coach decided to use me as a starter. This happens in football, but the good thing is we played a good game.
"It is never easy to play or win here. It's obvious we had to win this game to be leaders by Christmas.
"We have to prepare well for our Copa del Rey match and reach the next round."