Kevin Pietersen said in his apology, "I truly didn't mean to cause upset or tension particularly with important games at stake".
The England batsman was dropped for the final test against South Africa - which begins tomorrow - after it came to light that he had sent derogatory texts to the rival team.
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The exchange was the biggest flare-up between the sides in weeks.
A report found that just six out of 96 top leaders at the corporation were non-white men.
Court of Appeal judges ruled his 30-year jail term for sex offences against boys he coached was not excessive.