"It is often said a week is a long time in football and we have done very well to come back from that beating last Monday," said Gray "We set the tempo, we came out of the traps well and it was a fantastic response. We were pegged back at 1-1 but we got ourselves going again and we scored the winner late on."
"The players were wounded and hurt after the FA Cup game and make no mistake, Leeds are a fantastic team who will get promoted."
"It is a great result but it is only three points and we have to take this on to the Colchester game on Saturday."
Meanwhile Leeds boss Gary McAllister wasn't as happy.
"We knew it would be different from the cup tie," he said.
"They made it very difficult, they got in our faces and in the first half we never got going at all.
"In the second half we responded well and got on the front foot, but two bad goals again.
"We go in at half-time and I'm looking for a response again and I did get that - it was like night and day.
"I'm not looking for excuses for the first half but Northampton came and pressed and pressed and we were a little bit naive I felt - still trying to play too many passes when it might have been a night for knocking it a little bit longer.
"Second half we did knock it a little bit longer and got up behind it and looked a better team."