Castleford backed up their defeat of Warrington Wolves in Super League round one with a hard-fought success against an injury-hit Leeds side.
Powell described his players’ effort, just five days after their previous game, as “awesome” and insisted: “Two from two, I don’t think anybody expected that, seeing Warrington and Leeds at the start, but we did.
“It has been a tough start and we have done a great job with it. It was a tough game, particularly on the back of a five-day turnaround.
“Physically, I thought we battled through; I don’t think we were ever at our best with the ball, but it was pretty courageous to win the game.”
Leeds were without nine players, including Richie Myler who was a pre-match addition to their casualty list owing to a hamstring problem which could keep him on the sidelines for three weeks.
Their coach Richard Agar said: “It was a real odd ding-ding battle, an arm wrestle.
“I am going to credit the opposition, I thought they defended their tryline really well.
“Clearly, we are missing some strike out of our team, but when we look back we will see a couple of opportunities we maybe should have made more of.
“But I was proud of our effort.”
Match report: Page 6