Warner was the team's vice-captain during the sandpapergate incident and was subsequently handed a 12-month ban from international and domestic cricket. David Warner backed Khawaja's ball-tampering claims, criticized Cummins. Warner detailed personal toll, including losing baby, constant abuse. Former coach Justin Langer supported Cummins,. Former Australia opener David Warner has said he is ‘very, very disappointed’ with Test captain Pat Cummins, accusing him of throwing their former team-mate Usman Khawaja ‘under the.