MS Dhoni turned back the clock to script a three wicket victory for Chennai Super Kings against Mumbai Indians in the IPL here on Thursday, following a heart-stopping finish that saw him hit a four off the last ball of the game. CSK pacer Mukesh Choudhary wreaked havoc with the new ball before Tilak Varma's responsible 51 not out off 43 lifted Mumbai Indians to 155 for seven. AS IT HAPPENEDDhoni (28 not out off 13) batted like the finisher of his hey days to help CSK get the required 17 runs off the final over to win their second game of the season and extend Mumbai Indians winless streak this season to seven games.