Yadav (2/28) dismissed a well-set Shikhar Dhawan (51) to trigger Sunrisers' collapse and help KKR restrict them to just 149 for 8.
"I had seen some videos of Dhawan. I was trying to contain him with singles and twos and not allow him to hit boundaries and sixes. I was trying to bowl according to the field. I bowled a wrong'un and got his wicket," Yadav, who played his second match of the season, told a news conference after his side's win.
"There was pressure when you replace a senior player and especially in the last round. But I was happy at the same time. The way I kept on bowling it released the pressure gradually," he said.
With toady's win, KKR may face the same opponents in the eliminator and Yadav said it would be an added advantage.
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"If we take them in the play-offs, it will be an added advantage having beaten them in the last round. We will have to keep it simple, knowing their weakness."
Sunrisers seamer Bhuvenshwar Kumar said the loss should serve as a wake up call to their team ahead of their play-offs match.
"We didn't get the momentum going. We knew we were already in the play-offs and were playing for the top two places. Now we have to switch off and start afresh," he said.
The Sunrisers middle-order failed to capitalise on the start given by Dhawan as they were restricted for 149 for 8 but Kumar backed his batsmen.
"We started losing wickets in the middle after Dhawan's wicket which brought our downfall."
There will be India team selection tomorrow for Zimbabwe tour but the leading wicket taker of IPL said he has stayed focused.
"You always take it positively. I'm not thinking much about selection. My focus is only on playoffs at the moment. It's not in my hand so I don't think much about that."
"His action is such that it's difficult to pick anything from him. His action is deceptive and there's also a language barrier. But he shares small small things which will help the Indian team when we take Bangladesh in future.