Sunday 13 March 2016 08:27, UK
Novak Djokovic admits he doesn't personally read all e-mails sent to him by the World Anti-Doping Agency and instead relies on his support team to notify him of any changes.
The 11-time Grand Slam champion says players should get more support from tennis' governing body in ensuring they do not fall foul of the changing regulations.
Former world No 1 Maria Sharapova announced on Monday that she failed a drug test at the Australian Open in January.
Sharapova tested positive for meldonium, which was added to WADA's banned list at the start of this year.
"I have to be frank that I don't read them all, but I have a team of people working with me and I have 100 percent faith and if there is any significant changes that I need to be aware of, then I am made aware of it," said Djokovic.
"It's hard to judge and blame anybody here. I know this substance has been banned recently. It can happen to many people if it's only a case of negligence, of Maria and her team not paying attention to the change.
"Communication from the side of the governing bodies should be a bit better. We live very busy lives, there is a lot happening, the least we can do is have the double confirmation of the change from the ATP side."
Djokovic has also given support to his 'friend' Sharapova for the way she has delt with the failed test, but said that as a professional he believes she should be punished.
"I thought she was very courageous. It was very human and brave of her to take responsibility, to go out and say what happened. She has approached this very maturely and I really admire that," he added.
"On the other hand, as someone who has been involved in tennis for so many years and has always believed in clean and fair sport, if there was a mistake and she was found to be positive of doping of a certain substance, there should be consequences for that."
