Welsh paralympic swimming star David Roberts is out of the British international disability championships after breaking an elbow.
But he hopes to return for July's European Championships in Berlin.
Roberts, 30, suffered the injury training with his club Caerphilly when he clashed arms with another swimmer.
The British event takes place on 8-10 April and Roberts said: "I'm confident in my ability to bounce back and still have Berlin very much in my sights."
However, Roberts has yet to discover when he will be able to return and if ruled out of the event in Berlin, he will instead target the 2012 London Paralympics.
The 11-time Paralympic gold medalist said: "I am bitterly disappointed to sustain this injury at such a crucial time in my preparations targeting the European Championships.
"I'm aiming to be there and I'm fairly confident I can get through this and I'll make it.
"If I don't, let's get ready for London."
Roberts is Britain's mostsuccessful Paralympian of the modern era alongside compatriot wheelchair racer Baroness Tanni Grey-Thompson
But this is the latest setback for Roberts, who in October 2009 suffered a fractured elbow, bruised ribs and a bruised right shoulder, while he has also had kidney stones and a broken foot in recent times.
He added: "It's been disastrous since Beijing. Hopefully this will be the last of the bad luck and I can concentrate on what I do best - swimming."