Five-time champions Chennai restricted Rajasthan to 141-5, a total they overhauled with five wickets and 10 balls to spare in their last home game at MA Chidambaram Stadium.
Samson steered table-toppers Rajasthan home with one over to spare for their eighth win in nine matches.
Rajasthan registered their seventh win in eight matches
Shimron Hetmyer's explosive 27 runs off 10 balls helped Rajasthan Royals edge out Punjab Kings with a three-wicket IPL win on Saturday.
While Rajasthan cling on to their table-topping position above Kolkata Knight Riders, the Titans clawed their way back to a dramatic victory in the final five overs, needing 73 off the final 30 balls.
Rajasthan emerged victorious with five balls to spare, prompting further scrutiny of Kohli's approach and effectiveness in T20 cricket.
The England white-ball captain managed scores of 11, 11 and 13 in his first three matches even though 2008 champions Rajasthan kept winning.
Kohli earlier had struck the first century of this IPL season.
Buttler was the IPL's Most Valuable Player in 2022 but had a forgettable outing in 2023.
Captain Samson hammered an unbeaten 82 off 52 balls to steer inaugural IPL champions Rajasthan to 193-4 after they elected to bat first in Jaipur.
Root made his IPL debut last season for Rajasthan
He once lived in tents and sold street food to pursue his cricketing dream. Now, sizzling talent Yashasvi Jaiswal is the toast of the Indian Premier League.
While Bangladesh, despite being a Test-playing nation for over two decades, are still struggling to grow a decent wrist spinner, superstar leggie Rashid Khan of Afghanistan made a bold claim that his country boasts ‘more than 1000’ wrist spinners.
Afghanistan spinners Rashid Khan and rookie Noor Ahmad ran through the Rajasthan Royals as Gujarat Titans sealed an easy nine-wicket win in the IPL on Friday.
"I used to sleep in a dairy and then stayed at my uncle's place but it wasn't big enough and he asked me to find a different place," Jaiswal told AFP in an interview
Maxwell led the way with 77 off 44 while du Plessis hit 62 off 39 balls before being run out for 62. Maxwell switch-hit Ravichandran Ashwin straight to Jason Holder at backward point for 77
Former Indian cricketers Virender Sehwag and Sunil Gavaskar both criticised David Warner’s performance for the Delhi Capitals against Rajasthan Royals on Saturday, where the Capitals were let down by a poor chase against the Royals’ total of 199.
"It's always my favourite shot. I'll try and play it as much as I can," the 32-year-old told team mate Yuzvendra Chahal in a post-match video after their 72-run victory
Buttler's 22-ball 54 led the team's batting onslaught as they posted 203-5, and then their bowlers restricted hosts Hyderabad to 131-8 in the first match of the day