In reply, India were placed at 25/1, trailing by 544 runs at stumps.
"We were expecting a fight-back from England (after the defeat in the last Test)," said Kumar.
"So we expected them to come back stronger. The wicket was good for batsmen and as a bowling unit we did our best.
"Sometimes it happens," he added, referring to the poor performance in comparison with the way India bowled in the first two Tests.
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After a long time spent in the field, India even resorted to strange tactics post-lunch when M S Dhoni deployed his three medium pacers in one-over spells. It did help produce two wickets wherein only 30 runs were conceded in 13 overs.
"We were tired as I said and it was an easy wicket for the batsmen. So it was hard work. So the captain wanted us to bowl one-over spells and personally I found that easy. That way we didn't really get tired and we also found our rhythm," said Kumar, obviously impressed with the tactic since he picked both wickets in this interim.
"Being a bowler, you expect them to catch those. But we also know they will catch a few, they will drop a few. This happens in cricket and happens with every team. We just have to give them confidence. Overall the catching in this series has been quite good," he said.