M Shahrukh Khan smashed a dramatic last ball six to help Tamil Nadu defend the Syed Mushtaq Ali Trophy T20 title with a thrilling four-wicket win over Karnataka in the summit clash here on Monday.

Needing 16 runs off the last over bowled by Prateek Jain, power-hitter Khan kept his cool under pressure to clobber the final delivery over deep-square leg to take TN to 153 for 6 and seal a famous win.