A 66-run fourth wicket stand between skipper Eoin Morgan (47 not out off 40 balls) and Rahul Tripathi (41 off 32 balls) provided the base for the Kolkata franchise to reach the target with 3.2 overs to spare.
The 34-year-old is competing for the Delhi Capitals this season and hopes to return to the side 'if things go in the right direction'.
Moeen Ali bagged the Man of the Match award for his all-round performance with the bat and the ball.
Sanju, who was dropped on 12, struck 12 boundaries and seven sixes to register the first century of this season's IPL.
Sadiq Khan said that he is in talks with BCCI for hosting the tournament in the near future.
The 2021 IPL is scheduled to be held in six cities—Chennai, Mumbai, Delhi, Bengaluru, Kolkata and Ahmedabad—as teams move into bio-bubbles in the cities allotted to them amid the COVID-19 pandemic.
The England pacer went under the knife to remove a glass fragment from a tendon on his right hand on Monday after an attempt to clean his fish tank went wrong.
The defending champion start off their campaign against Royal Challengers Bangalore in Chennai on April 9.
Sanju, who was handed the reins of the Japiur-based team in January, has recuperated from a knee injury which he suffered during the Vijay Hazare Trophy.
While the BCCI has given no reason for this, the tight scheduling of successive series due to the COVID-19 pandemic is believed to be the reason.