Australia cricket: Usman Khawaja says he has not 'thrown anyone under the bus' with claims about ball-tampering scandal
Usman Khawaja says he made "promise" to friend David Warner that he would tell the truth about the 'Sandpapergate' scheme; former Australia batter says he initially wanted to come clean in 2018 but was talked out if by Steve Smith; Khawaja's claims come ahead of release of his book