Under Mourinho in 2014/15 Hazard was the best player in the Premier League taking Chelsea to the title.
But last season the Belgian's form dipped markedly and Mourinho was sacked in December 2015.
David Luiz's outrageous celebration after cheeky free-kick against Liverpool
Wed, February 1, 2017
David Luiz let it all out after scoring a belting free-kick for Chelsea in their 1-1 draw against Liverpool at Anfield
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David Luiz sparked wild celebrations with his goal against Liverpool last night
However Conte has managed to revitalise Hazard in this campaign, scoring nine goals in 23 appearances in all competitions.
Chelsea have a nine point lead in the league and Hazard explained how Conte's greater emphasis on tactics has impacted his form.
Eden Hazard has returned to his best under Antonio Conte
"In tactics and training we do more with Conte," he told Sky Sports.
"We work a lot of tactical positions and we know exactly what we have to do on the pitch, where I have to go and where the defenders have to go.
Chelsea ace Eden Hazard
"We know exactly what to do. With Mourinho, he put in a system but we didn't work lots. We know what to do because we play football, but maybe the automatisms were a little bit different.
"With Mourinho, Nemanja Matic was behind me in the season when we won the title and sometimes I stayed in front and Matic did the job.
"With Conte it's different. I close more inside because Marcos Alonso is there as a wing-back. I just need to be ready to counter-attack if we get the ball."