David Warner has thrown his support behind Usman Khawaja's revelations about the 2018 ball-tampering scandal, calling his claims accurate. Warner also questioned the investigation into. Warner, one of three players banned for the 2018 ball tampering controversy, has addressed what Khawaja outlined in his autobiography. David Warner has backed Usman Khawaja's comments on the 2018 ball-tampering scandal, saying his revelations were completely accurate.