Liverpool have confirmed that Jamie Carragher broke a rib during yesterday's win at Sunderland.
The stand-in captain was taken off with 15 minutes remaining at the Stadium of Light, and tests today have confirmed the break, along with a pneumothorax, or collapsed lung.
Carragher's injuries will not require further treatment, but the diagnosis would appear to rule him out of Tuesday's Champions League third qualifying round second leg against Toulouse.
There is better news over fellow centre-back Sami Hyypia, who was also forced off yesterday with what has been confirmed as a broken nose.
He is expected to be able to play against the French club, however, after coming through a training session at Melwood today.
A Liverpool spokesman told club website www.liverpoolfc.tv: 'Sami has a broken nose but will be available for the second leg of our Champions League qualifier.
'Jamie underwent a series of investigations on Sunday morning which confirmed he has a broken rib and has also developed a pneumothorax.
'He will continue to be monitored on Sunday but at this stage no further treatment will be required.'