England fought a tough, hard semi-final against India, but eventually lost to India. McCullum felt two key moments were the point of difference.
While the first was Sanju Samson's dropped catch when he was batting on 15, to which he punished England, scoring 89 runs in 42 balls. The second was of Axar Patel's brilliant running catch to dismiss Harry Brook.
"We put the chance down, and he was able to capitalise on it from there. It is hard to regain that composure when you've got a player who's going like that," McCullum said.
"I'll probably look more at their two catches, to be honest. I think it is not an easy ground to field with the ball sailing everywhere. To be able to stay in the contest, the Indian players were able to execute those catches. Axar executing those catches, it was the difference in the game," he added
"Bumrah is the best bowler in the world. He executed brilliantly and he shut the game down. But you have to be positive and try to be aware of what he's trying to do, which is bowl the slower ball and still hit his yorker and put him under pressure," he said.