"Sachin (Tendulkar) is back, that makes a difference. They (Mumbai) are coming off a good win," Simmons told reporters here.
Tendulkar missed action after getting hit on his finger in the opening game on April 4 and returned to the opening slot against Kings XI Punjab yesterday.
Simmons said the Daredevils would look to take the positives from their big win in the first-leg match against the Harbhajan Singh-led side.
"Good win against them last time. We will take the positives from that game."
The Daredevils thrashed Mumbai Indians by seven wickets after bowling them out for 92 at the Wankhede Stadium on April 17.
While the Daredevils are expecting a tough encounter tomorrow, Simmons said winning matches from the jaws of defeat test a team.
"It's good to win from losing position, it's always good to win from tough situations."
The Daredevils could not train today due to bad weather.
