Chelsea forward, has revealed what caused the club’s flop last season.
The Belgium captain said “motivation” and “fitness” may have played a part in the club’s slump but he is determined to learn from the experience.
He told reporters, “That’s football. Sometimes you are on the top, two years ago we won also the league, but last season was difficult for some reasons.
“Sometimes motivation is not on the top, fitness is not on the top, so a lot of things.
“[This season] we started well and we won the league, but next season we will be in trouble if we don’t work hard like we did this season.
“We need to be ready every year in the same level to be on the top.”
The Blues has already won this season’s Premier League title with a 1-0 victory over West Brom on May 12 after being on top of the table for much of the season.
Chelsea are also set to take on Arsenal in the FA Cup final on May 27.
Hazard has shown much of his old self manager Antonio Conte scoring 15 Premier League goals this campaign, and is determined to finish a fantastic season in style.
He added, “We can’t celebrate a lot because we have the FA Cup final, we have to be ready for that, but after West Brom we did a little party together.
“Even in the dressing room, it was good to see the smile on faces. I think at the end of the season we deserved to win this title.
“It’s not just me, the whole team, all the players they have been fantastic. We won a lot of games.
“We have one more game [against Sunderland on Sunday] and the FA Cup final to play. I hope we can win the double.”