Unadkat's performance this season was not up to the mark as he could manage just 10 wickets in 14 games with an economy rate of 10.66.
Rajasthan Royals won three and one match got abandoned of the five matches under Steve Smith's captaincy.
Samson scored a 32-ball 48 against the Sunrisers.
There will be a good amount of cloud coverage during the game.
With 4 wins from 11 games, the Royals need to win all of their remaining league games to stand a chance of progressing ahead.
"I know how disappointed he was to miss out on the World Cup."
Both RR and DC are coming off victories in their previous games.
Buttler takes a stand on Dhoni's no ball fiasco against Rajasthan Royals.
Warne wasn't pleased one bit with Harsha defending Ashwin's actions by stating the laws of the game.
The Aussie opener scored a duck in his last two matches.