Chelsea's 2-1 win over Sunderland on Sunday saw them move back into third, above Tottenham on goal difference after Spurs were held to a draw by Everton.
"We knew that we had to win and especially because they (Tottenham and Arsenal) will continue winning," Benitez told Chelsea TV.
"The main thing for me is the big picture, so keep calm. We have a good team, if we perform at our level we can win against anyone.
"You have some bad games and good games but it will be the same for them.
"We have to carry on. We have one game in hand on Tottenham so if we can do well, especially against them, maybe it's a game that can mean six points."
Benitez is ready to rotate against Rubin at the Luzhniki Stadium on Thursday as he looks to protect a 3-1 advantage from the first leg of their Europa League quarter-final.
"We're considering changing system if necessary to put fresh legs on the pitch and be stronger; not be more defensive, to be stronger," he added.
"The difficult thing in this game is everybody thinks it's done. It's not done.
"We'll play on a synthetic pitch. It will be minus five and if they score one goal, we will be under pressure.
"It's important for us to score but the main thing is to approach the game with the right mentality."