Novak Djokovic is searching for answers after the International Tennis Integrity Agency announced it would not suspend Jannik Sinner despite him testing positive for steroids twice.

Djokovic said there is a “lack of consistency” in the way the International Tennis Integrity Agency determines penalties.

“We see a lack of standardized and clear protocols,” Djokovic said, according to the Associated Press (h/t ESPN). “I can understand the feelings of many players who wonder if they are being treated the same.”

This article will be updated soon with more information and analysis.