Mumbai Indians' pacer Jasprit Bumrah (right) takes a break during a practice session on the eve of their IPL opener against Chennai Super Kings at Wankhede today. Pic/Suresh Karkera

Mumbai Indians (MI) have no reason to believe that they can't defend the Indian Premier League (IPL) title when they step on the Wankhede Stadium turf today to face Chennai Super Kings (CSK) in the opening clash of the 11th edition.