Pat Cummins, Josh Hazlewood, Mitchell Starc, and Nathan Lyon have released a statement where they have pleaded innocence.
The issue was back in the spotlight when Bancroft last week revealed that Australian bowlers in the team might have had some knowledge.
Gilchrist said that ball-tampering has been an issue in the sport for a long time and slammed CA for never delving into the issue.
Cricket Australia have reopened the investigation into the sandpapergate scandal during the Newlands Test against South Africa.
Cricket Australia will reopen the investigation into the events of the 2018 Cape Town Test, it was announced on Saturday.
Cameron Bancroft has given a new dimension to the Newlands ball-tampering scandal, saying that the bowlers probably 'had knowledge'.