Injury problems for Reds
By Paul Higham
Last Updated: 01/01/70 1:00am
Smicer picked up the problem during Liverpool's 5-1 friendly win over Celtic in America, but doctors feel he has seriously damaged his knee.
The Czech Republic star may now require surgery on the problem and will miss the start of the season as a result.
Former Lens man Smicer has had a torrid time with injuries and this is just the latest blow to his hopes of becoming a regular under new boss Rafa Benitez.
"I had a scan and it showed that maybe I need an operation. If I need an operation then I will get that done on Friday," Smicer told the club's website.
"It is bad timing with the new manager just arrived. I didn't want to have an operation before the start of the season but if I'm not going to be fit for the start then there's not much I can do about it.
"If it's only a minor operation then I will be out for six to eight weeks but if it's the cartilage it will be longer."
Kewell may also be a cause for concern for Benitez, after reports that he has suffered a recurrence of his old ankle injury.
The Australia international was plagued by an ankle complaint in the second half of last season, and there are fears that it has become a problem again.
Reports back in Australia have suggested that the same old problem has resurfaced after the Celtic match, and it could also rule the former Leeds man out of the opening of the new season.
Benitez's men start the season early with a UEFA Champions League qualifier on August 11, before a trip to Tottenham on the opening day of The Premiership.
Kewell could miss both matches should his injury prove to be serious, and that would be a worry to the new Anfield boss.
The Aussie had a decent start to his Liverpool career, but his ankle problems saw him notch just three of his 11 goals after Christmas.
Benitez will be hoping that Kewell is not suffering from his old problem, as that could hamper his season before it has even started.