Antonio Conte has his most powerful weapon back at his disposal after he returned for Belgium over the international break. He started against Gibraltar and come off the bench against Greece.
Hazard proved his leadership and strength as he returned from a broken ankle ahead of schedule as he spent long days at Cobham Training Ground while other players were on holiday. His reward was an early return for his national team to captain his country to earn their spot in this summer's World Cup in Russia.
Chelsea may have earned six points from their first three games without Hazard but he takes them to the next level with his incredible technical abilities. He is Chelsea's marquee player and he is worth the ticket price or television subscriptions on his own.
Hazard's return was always due to be Leicester but his matches for Belgium are a bonus as it has eased him back into competitive football. His 77 minutes against Gibraltar was a gentle reintroduction as they won 9-0 ahead of tougher tests.
He had played in a 3-0 defeat to Everton for Chelsea U23s before that but he looked off the pace. After meeting up with Belgium, he has come back much sharper and ready.
Belgium's 2-1 away win saw Hazard put in a 26-minute cameo against the toughest side in Group H in the World Cup qualifiers. The calibre of opponent seemed to lift Hazard's game further, as he was brought on to guide his side home to victory.
Hazard's return for Chelsea comes as the crisis talk dies down around Stamford Bridge as the club secure the six signings required to make them competitive in the Premier League this season.
The former Lille man spoke this week about the state of the team as he prepares for his comeback into the Premier League title-winning side.
"We played very badly against Burnley on the first match day, but we have improved since then," Hazard told DAZN . "I think we are ready for the coming matches. We lost some players and got new ones. I myself had to deal with problems of injury, but I am only one player of many.
"The team is ready to play and fight as we did last season. The only difference is that we are playing in the Champions League this season. In England you never know what will happen. Many teams can be champions.
However, the new signings don't overshadow Hazard's stock at Chelsea. He is the go-to player and he is one of the biggest reasons that Chelsea will be competing for major honours this season.
Hazard is so important to Chelsea that they signed his brother Kylian despite doubts that he will ever actually be good enough to start games for the Blues.
It will be intriguing to see how Hazard links up with Alvaro Morata in particular. The £60 million frontman is Hazard's new partner in crime as Diego Costa is exiled in his native Brazil away from the first team picture at Stamford Bridge.
Morata will be playing with a forward who may still have not yet reached his peak. Under Conte, Hazard improved yet again last season recording 16 league goals, a personal best at Chelsea.
His shooting accuracy went up to 20.8 per cent last season which is a career best for Hazard, even better than in his 2goal final season in France, while he was playing for Lille.
Hazard's most standout skill is ability to dribble and take players on. He seems to have refined that further under Conte as he has reached a career high of 74.5% for his dribble success rate.
Under Jose Mourinho in 2014/15, Hazard dribbled 100 times more than he did last season. He only attempted 192 dribbles last season, which suggests that he is picking his moments and adapting his game.
The 26-year-old show signs that he can still improve further, which is a frightening thought for opposing Premier League teams to come to terms with.
Craig Shakespeare is the first manager to deal with Hazard this season but there's very little he can do to prevent the match from turning into a tragedy.