Jadeja, who has been recalled into India's Test squad for the upcoming series against South Africa, had snapped six for 75 yesterday and he followed it up with a brilliant seven for 60 to help Saurashtra register their third successive wins.
With this win, Saurashtra grabbed six points from the match to top Group C with 19 points from three wins in as many matches.
After an exciting opening day which saw two stunning batting collapses, the second day of the match saw Saurashtra post 215 all out in 67 overs in their second innings to set Hyderabad a victory target of 170 runs.
However, Hyderabad's runchase was derailed by Jadeja, who struck right from his first over, as the visitors folded for 134 in just 40 overs at Saurashtra Cricket Association Stadium.
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Apart from Jadeja, Kamlesh Makvana (2/28) and Dharmendrasinh Jadeja (1/22) were the other wicket takers for Saurashtra.
Brief Score:
Saurashtra 102 & 215 allout in 67 overs (CS Jani 65; M Hassan 5/69)
Hyderabad (India) 148 & 134 all out in 40 overs (BP Sandeep 46; R Jadeja 7/60).