A statement from the world's top-ranked player says all checks "were satisfactory and showed positive evolution" regarding the injury, which contributed to his loss to Stanislas Wawrinka in the final in Melbourne.
Nadal is continuing to work out in the gym and his return to the tennis court — starting on Thursday — will decide "when he is ready to return to competition."
The Spaniard is scheduled to play in Buenos Aires next week. Tournaments in Rio de Janeiro, Indian Wells and Miami follow.
Doctors had prescribed anti-inflammatory medication and physical therapy to speed his recovery.