Bangladesh fast bowlers Nahid Rana and Taskin Ahmed left for Australia ahead of the rest of the national squad, with both set to consult specialists before the upcoming two-Test series.
Nahid, who has already been ruled out of the series after suffering a Grade 2 side strain during the T20I series in Zimbabwe, is scheduled to fly out on Sunday night.
But the main purpose of his trip is to seek treatment for a long-standing shinbone problem rather than the side injury that forced him out of the Australia tour.
The pacer has been managing discomfort in his shin for some time and will undergo specialist assessment in Australia.
Taskin is also travelling early to have his shoulder examined by a specialist before linking up with the Bangladesh squad. The senior fast bowler is expected to spearhead Bangladesh's pace attack in Nahid's absence.
The Bangladesh Cricket Board (BCB) said earlier this week that Nahid is expected to need six to eight weeks to recover from his side strain, which effectively ruled him out of both Tests.
Bangladesh begin the series against Australia in Darwin on August 13, with the second Test scheduled for August 22 in Mackay.