Mumbai heaped on the agony for Tamil Nadu, scoring 378 in the first innings to build a commanding 232-run advantage.
Deshpande found greater joy in influencing the match's outcome in favor of his team than in achieving the record, which he regarded as merely materialistic.
The partnership between Kotian and Deshpande also marks just the third instance where an Indian pair has orchestrated a remarkable 200-plus stand for the last wicket.
A ripping delivery from CSK's Tushar Deshpande stole the show and became one of the highlights of the match as it cleaned up the 'Hitman'
Fast bowler Tushar Deshpande, who has 50 wickets from 20 Ranji Trophy games for Mumbai, is happy that he is back to what he loves doing after a six-month COVID-19 forced break.
Mumbai, coached by Vinayak Samant, start their campaign in the 2019-20 prestigious domestic tournament on Friday itself.
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Mumbai registered their second consecutive win in Super League.
Mumbai had started the stage with a comprehensive defeat put their campaign back on track thanks to Tushar Deshpande and Shreyas Iyer.
Deshpande has snapped 11 wickets in six matches of the T20 tournament so far.