Absence of stringent punishment for ball tampering encouraged players to cross the line, says former Australia captain Steve Waugh, who blames the authorities for the 'sandpaper gate' that led to suspension of Steve Smith and David Warner. Smith and Warner were slapped with a one-year international ban while Cameron Bancroft was suspended for nine months by Cricket Australia in March this year for their role in the ball-tampering scandal in South Africa.

Ball-tampering was classed as a level two offence under the ICC code of conduct when the Newlands incident unfolded, but it has since been elevated to a level three category, which carries a ban of up to six Tests or 12 ODIs. "You know they push the boundaries a bit by throwing the ball into the rough on the ground, which they shouldn't do and then it's escalated from there. It's a shame how it got to the point that it did but I guess the authorities let that happen," Waugh told ESPNcricinfo at a Laureus event in Paris.