England batsman Kevin Pietersen says hes comfortable with the levels of sledging in the current Ashes series as Australia turns to its old tactic of using verbal aggression to unsettle opponents. Pietersen told a news conference Wednesday there had been verbal clashes between players in the first three matches of the five-match series but theres nothing thats been overboard. His comments followed an assertion from the head of the Australian Cricketers Association that Australias recent downturn in form was directly attributable to warnings to tone down its sledging after an acrimonious test against India at Sydney in 2008. Paul Marsh said opponents had exploited Australias caution but a more aggressive approach in the third Ashes test at Perth had produced Australias best win in years.Pietersen,who along with James Anderson had been the most verbal of Englands players in the series,told reporters on Wednesday the level of tension in the past three tests between England and Australia had been typical of an Ashes series. You guys (the media) feed them some good lines, Pietersen said. They talk a lot. Nothings different. Theres not really any big chirpers or big sledgers,its just England versus Australia. Its an Ashes series.Blokes get a bit of red mist occasionally. Youre allowed to do that on both teams. Youre playing for a little urn. Its historic. Its huge. But theres nothing thats been overboard.However Pietersens comments were contradicted by teammate Matt Prior who said in a regular newspaper column on Tuesday that the verbal send-off he received from Australia fast bowler Peter Siddle after his dismissal in Perth was like kicking a man when hes down.He got me out luckily,maybe,as the ball trickled off my body on to the stumps,but out still, Prior wrote in The Independent. As I left he said something which annoyed me. It doesnt matter what he said but once you have dismissed somebody you have done the job on them.There are not many boxing matches when a guy knocks someone out and then kicks him while hes on the floor. That isnt the way it works.Siddle told a luncheon Wednesday that Prior had challenged him to a fight after the days play. At a later news conference he said some England players were only complaining about sledging because they lost. We won the game. Thats why theyre making such a big deal of it, he said.