- Tag results for Eden Hazard
Sarri is confident Hazard will be involved when Palace visit Stamford Bridge, but he is still waiting to decide whether the Belgian playmaker will start or come off the bench.
After sealing an impressive 10th straight victory at home to Leicester in the Premier League on Monday, Unai Emery's outfit are the team to watch in Group E.
Real Madrid could do with Hazard's firepower in the absence of the departed Cristiano Ronaldo, having failed to score in four consecutive games for the first time since 1985.
Both sides remain unbeaten in the league with Liverpool second behind champions Manchester City only on goal difference and Chelsea just two points adrift in third.
Sarri has repeatedly insisted his side can't yet be compared to City or Liverpool in their third full seasons under Pep Guardiola and Jurgen Klopp.
Sarri believes Hazard can become the best player in Europe and outstrip even arch poachers Harry Kane and Mohamed Salah.
Hazard struck twice in seven minutes just before half-time to cancel out Sol Bamba's early shock for the hosts at Stamford Bridge before completing his hat-trick from the penalty spot.
Eden Hazard converted a 29th-minute penalty after a foul on Lukaku, with the Manchester United striker netting a quick-fire second before adding a third in the closing stages.
Roberto Martinez's men showed their class and no hangover from their exertions in finishing third in Russia to warm-up for their Nations League opener against Iceland on Tuesday.
Chelsea refused to sell the forward and Hazard, now in his seventh season at Stamford Bridge, is enjoying Sarri's style of play after the more conservative tactics of former Blues bosses.
Hazard has started on the bench for Chelsea's opening two games of the Premier League season after the Belgium playmaker only returned to training earlier this month following the World Cup.
The future of Hazard, who only returned to training with his club a week ago after helping Belgium finish third at the World Cup, may not be sorted out until August 31.
Sarri believes Hazard is happy and does not have the same personal reasons as Courtois to move to Real Madrid.
Brazilian international Willian has given Chelsea a huge boost by committing his future to the Premier League giants as the futures of Thibaut Courtois and Eden Hazard remain in doubt.
New Chelsea gaffer Maurizio Sarri admitted to being disinterested by the transfer market.