The Belgian international continues to be linked with a move back to Italy, but the Blues legend says he expects him to stay at Stamford Bridge beyond this summer.
Lukaku rejoined Chelsea from Inter last summer for a club-record fee of £98 million ($122m) but has been tipped to return to San Siro after a disappointing first year back in London.
But Cech has insisted that the 29-year-old will remain at Stamford Bridge this season, highlighting that his struggles with injury and Covid-19 explain his poor performance over the course of the 2021-22 campaign.
Speaking to Sky Sports News as reported by GOAL, Cech said;
“I personally believe Romelu Lukaku will have a great season.
“Last season we saw how strong he can be when he came. Unfortunately, the long-term injury he sustained against Villa slowed everything down, and then he had Covid-19 as well.
“We could see towards the end of the season when Romelu Lukaku was fit and ready to go how strong he is. We had a peculiar season with the Covid-19 issues around Christmas. He was one of those players affected.
“I have full confidence Romelu Lukaku will bounce back and have a strong season.”