Britain's Dan Evans has been warned by the Lawn Tennis Association that any support is "entirely dependent" on his level of professionalism as he returns to training after being banned for failing a drugs test.
He will be eligible to compete from 24 April after serving a one-year ban.
Evans, 27, tested positive for cocaine during last April's Barcelona Open.
He has shown "genuine commitment to getting his tennis career back on track", said the LTA.
Under the terms of his suspension, the former world number 41 was allowed to access LTA facilities and support again from last Saturday.