Cape Town - Thibaut Courtois believes the title race is far from over, despite Chelsea's early-season dominance and their rivals' struggles.
The Blues have raced into a four-point lead at the top of the standings and have yet to taste defeat in their opening 11 league games of the season.
Expected title-challengers Manchester City, Arsenal and Liverpool, though, have struggled for form so far this campaign.
The Citizens are already eight points behind, with the Gunners 12 adrift, while the Reds have 15 points separating them and the top of the table.
However, Courtois is expecting a tough battle for the Premier League crown, saying that nothing is won in November.
"We don't have the title in the bag," the Belgium international was quoted as saying by Football411.
"We are working game by game. The Premier League is very difficult.
"We are trying to win with every game that is possible. But there will be a still a long way to win the title. We are working hard. Hopefully that will be enough."
The Blues have raced into a four-point lead at the top of the standings and have yet to taste defeat in their opening 11 league games of the season.
Expected title-challengers Manchester City, Arsenal and Liverpool, though, have struggled for form so far this campaign.
The Citizens are already eight points behind, with the Gunners 12 adrift, while the Reds have 15 points separating them and the top of the table.
However, Courtois is expecting a tough battle for the Premier League crown, saying that nothing is won in November.
"We don't have the title in the bag," the Belgium international was quoted as saying by Football411.
"We are working game by game. The Premier League is very difficult.
"We are trying to win with every game that is possible. But there will be a still a long way to win the title. We are working hard. Hopefully that will be enough."