Australian Grand Slam Champion Max Purcell has entered a voluntary provisional suspension after breaching tennis’ anti-doping rules.

Nine's tennis expert Brett Phillips told Jason Matthews on 4BC Wide World of Sports, 'we see with the best players, these cases tend to get resolved very quickly.'

'That's been the big argument in tennis, the further down you are the chain, these things drag on.'

'Hopefully they're getting better at getting these things resolved quicker, but we just have to wait and see,' Phillips said.

Brett Phillips has also tipped Alexei Popyrin to be the Australian to watch this year.