Kevin Pietersen believes the increasing influence of technology in cricket will lead to batsmen all over the world reassessing their techniques.

Pietersen endured a rocky start to the tour of Bangladesh, mustering only 69 runs in seven innings before bouncing back to form with 99 in the first Test at Chittagong. The majority of his problems were caused by slow left-armers, with Abdur Razzak becoming something of a nemesis in the one-day series.

Pietersen feels that is down to a shift in the outlook of umpires, who have been persuaded by the HawkEye system to give more leg-before verdicts, and he admitted: "I've had to work a hell of a lot harder than I've ever worked before."

He continued: "I've always worked hard in my career but I spent hours in those nets at Chittagong and something clicked. I might get two good balls next match but in terms of my form and technique I feel good.

"I think every right-hander has this now against left-arm spin - and every left-hander to right-arm spin."

Pietersen added: "If you look at some of the decisions, I think HawkEye has definitely played a huge role in lbws being given off the front foot.

"So you've got to sort your technique out and make sure you use your bat as the first line of defence.

"Batting has changed. It's no surprise to see that three of the top ranked bowlers in one-day cricket are left-armers (Shakib Al Hasan, Daniel Vettori and Ray Price) and that tells you something: there is work to be done."