Australia Test batsman Adam Voges has suffered a concussion after being struck on the head by a bouncer today during a Sheffield Shield first-class match between Western Australia and Tasmania.
Voges was helped from the field by medical staff after being hit on the back of the head by a delivery from Tasmania fast bowler Cam Stevenson.
The 37-year-old fell to his knees as players rushed to his assistance.
It is the second concussion Voges has suffered this year.
He was struck on the head by a fielder's throw while playing for the English county Middlesex in May.
Voges will take no further part in the current four-day match and it is not clear whether he will be available for Australia's third Test against South Africa.
Aus call on Hohns, Chappell
Sydney: Trevor Hohns was on Thursday appointed Australia's interim chairman of selectors after Rod Marsh quit, with Greg Chappell drafted in to help rescue a national team in crisis.
The experienced Hohns, who previously served as chief selector during a hugely successful period for Australia, currently sits on the four-man selection panel with Mark Waugh, coach Darren lehmann, and now Chappell.
Cricket Australia chairman David Peever said Hohns had agreed to step up to ensure continuity while the search for a full-time replacement was carried out.
"It is vital that Australian cricket finds the best candidate for this role," said Peever.
"Trevor is highly experienced as a selector, and will ensure we place our best players on the field this summer while we seek a permanent replacement for Rod."