Brisbane full-back Josh Hoffman has been cleared of a broken leg, but will still miss at least three weeks of NRL action with a high ankle sprain.

Hoffman feared the worst on Thursday night when he heard a "snap" in his right leg during the second half of the Broncos' loss to South Sydney.

However, scans have confirmed Hoffman only sprained his ankle.

The club said on Monday there is a chance the 26-year-old could be back for their final-round clash with Melbourne on September 5.

The 10th-placed Broncos need to win their final three games to make the finals, starting with Newcastle at Lang Park on Saturday and St George Illawarra next week also at home.

AAP