The Blues are currently six points clear at the top of the Premier League table and are firm favourites to lift the trophy in May.
But Antonio Conte’s men, who have won their last 12 league games, face a testing run of fixtures in the New Year.
Ahead of their clash with Stoke on Saturday, Courtois said: “In the Premier League things go really fast.
“So we just have to keep the focus on ourselves and play game by game and then we will see.
“We just have to keep the focus on ourselves and play game by game and then we will see”
Chelsea star Thibaut Courtois
“Stoke at home will be hard and then we go to Tottenham, to Leicester, they are all tough games, and after we have Hull, Liverpool and Arsenal.
“So it is an important moment for us and then we will see where we stand in February.
“If we keep our concentration on doing what we have to do then we can keep the run going.”
Chelsea have completely transformed their season following their 3-0 defeat at Arsenal in September.
They have not dropped a point in the league since and only conceded twice in 12 victories.
Courtois added: “Letting in only two goals is amazing.
“After that Arsenal game we had to build a new thing and we did it well, and there is a lot of hard work in training. It was not just that we did a new formation and it will work.
“As a goalkeeper it doesn’t change much but now we are more solid at the back than at the beginning of the season, it is harder for people to break us down, and when they do try to score a goal I try to save it.
“Some other teams tried to defeat us as well with that formation but if it is well-worked like we do it, it is hard to break down and every day in training we do it a lot.
“That is why we have this run at the moment and we just try to keep it going and we will see in few weeks and months where we are standing, and hopefully we will be there in the race for the championship.”