Cook said England will have to consistently maintain their standard of performance if they desire to beat India in the ODI series after the triumph in the Test rubber.
"It is obviously a great start to the series when you win the first game. It was an important game to win. But now we have to move on. Hopefully, we can keep up the standard of our performances and win the upcoming game," he said on the eve of the second ODI at the Nehru Stadium.
"They're (India) a world-class side and statistics show how hard it is to win here, but we're prepared for that. We will have to keep up our skills and our standard of performances, if we want to win this game and the series," Cook added.
Cook backed his pace duo of Steven Finn and Jade Dernbach to come good tomorrow even though they leaked a few runs in the first ODI at Rajkot.
"On that wicket (at Rajkot) it was incredibly hard for us to bowl. It was a really quick outfield. It was probably one of the fastest wicket I've played. There was no margin for error, everytime you stray slightly it was easy for batsmen.
"It was a very, very tough job and those two (Finn and Dernbach) held their nerves. They got hit for a few, but they put it to bed and came in the next ball and tried to get it better. We know how hard bowling in the first 10 overs are. Those two handled the first 10 overs very well, which is probably the most important thing," he said.