Adelaide, Feb. 20 : The international future of sidelined Australian fast bowler Shaun Tait is in doubt again, as he is suffering from a chronic form of hamstring tendinitis.

According to Fox Sports, Tait has had his own blood injected into the affected area in an attempt to fasttrack the healing process.

The injury to Tait''s left hamstring, which has destroyed his summer, is sabotaging his three-Test career.

Tait hasn''t played since taking 2-40 in Australia''s two-wicket loss to New Zealand in the Chappell-Hadlee Trophy series opener in Perth, and medicos don''t know when he will return.

"Shaun has sustained a tendon injury to his left hamstring. Australian team physiotherapist Alex Kountouris and I have been working closely with Shaun on his rehabilitation program, which has included autologous blood injection treatment here in Adelaide. He is recuperating well but there is no specified date for his return to cricket," Fox Sports quotyed ," Redbacks physio John Porter, as saying.

Redbacks officials don''t expect Tait to return for South Australia''s remaining Sheffield Shield games, against Western Australia and Tasmania, meaning he''s in doubt to menace the Proteas. Tait must now fight to ensure he can front for Indian Premier League champions Rajasthan Royals in April and May. (ANI)