David Warner will miss the rest of Australia's Royal London Series campaign against England after breaking his thumb.
Warner, hit by a short ball from Steven Finn and forced to retire hurt in the second one-day international at Lord's, will fly home on Monday.
The Australian opener was facing his first ball of the second of the match when he was struck.
Cricket Australia announced on Twitter: "David Warner has a fracture in his left thumb, expected to be out for 4-6 weeks. Replacement to be named in due course."
Warner, who in six years has never missed a match for Australia through injury, now faces a race to be fit for Australia's tour of Bangladesh next month.
Shane Watson was also off the field during England's innings, having suffered a calf strain, and will have scans on his injury in the coming days.