After failing to clinch the series against India, England`s head coach Brendon McCullum admitted that the team`s much-hyped "Bazball" approach needs some adjustment.

England started the series on a positive note with a victory in Hyderabad but things went worse for the side thereafter. India secured a win in all of the remaining matches.

Sometimes, you can get away with things. But when you`re exposed the way we have been in the back end of this series in particular, it does require some pretty deep thinking and some adjustment to make sure we`re staying true to what we believe in," Brendon McCullum told the travelling British media on Sunday.

"If anything, we got more timid as the series went on, and that was because of the pressure that was applied to us by the Indian line-up, not just with the ball. With the bat, they put us under a tremendous amount of pressure, too," he added.

Indian youngsters played a vital role in the series win. The absence of star players such as Virat Kohli, KL Rahul and Mohammed Shami made Yashasvi Jaiswal, Sarfaraz Khan and Dhruv Jurel lead the charge. The series loss was England`s first in the `Bazball` era.