Boss Mike Ruddock has revealed that back row Kai Horstmann is set for minor surgery on his rib injury - but has reported positive news over the fitness of quartet Chris Pennell, Calum MacRae, Matthew Jones and Olivier Sourgens.
Horstmann has been ruled out of action since suffering the injury against London Wasps in mid-
But Director of Rugby Ruddock now hopes to have him back in four weeks after he goes under the knife in the coming days.
"We have decided with Kai that we will do a small operation around the rib to give a little bit of fixation to it," said Ruddock.
"He has got a cracked rib and we believe we can help that along with a bit of surgery so that will now happen.
"That will put him out for about four weeks, but that should out him right for the rest of the season and stop that reoccurring.
"We have some good options available to us in the back row so we won't rush Kai back. It's not a major operation to the extent of when you re-set a shoulder or a knee."
Ruddock has also announced that flying backs Pennell and MacRae are pushing for a comeback in the trip to Olympus Rugby XV Madrid in the Amlin Challenge Cup in Spain next weekend.
He said: "It's looking good for Chris. He has dropped back into training this week so he could well feature in the panel for the Madrid game. He might not start but could be on the bench, a lot will depend how he goes in the next week.
"He is comfortable and we spoke to him about going back into training. That is great news and hopefully everything will go to plan and he can make his comeback.
"Calum is now able to drop back into skills work, he can't do contact yet but will do next week ahead of the Madrid game. Hopefully he will be fine for that.
"We have also had some positive news over Matthew who has been told by the surgeon he can put load on his foot. He has done some jogging for the first time in a long time and over the next four to five weeks he can build that up so we can have him back.
"Meanwhile, Olivier Sourgens is making good progress; his return timescale is for the Harlequins game."
Worcester wing Ben Howard has been named in the England Under 20s team to take on New Zealand in the semi-final of the IRB Junior World Championship in Vannes, France, on Tuesday June 18, kick off 1945 (GMT).
The Warriors Community team have been busy working with people across Worcestershire over the last year and have been given the perfect reward for their efforts after being nominated for a top prize at the All Parliamentary Premiership Rugby Community Awards 2013.
The Worcester Warriors Community department joined forces with Stourport Rugby Club on Tuesday to welcome nearly 90 children from local primary schools to a tag rugby tournament supported by the Aviva Premiership Rugby Schools Programme.
Ben Howard scored two tries as England Under 20s stormed to a record-breaking 109-0 victory over USA to book their place in the IRB Junior World Championship semi-finals alongside South Africa, New Zealand and Wales.
Sign up with the Warriors before this Thursday (June 13) and you will also be entered into a prize draw to win a pair of tickets for this summer's J.P. Morgan Asset Management Premiership Rugby 7s Series at Kingsholm!
Worcester Warriors is delighted to announce its successful long-term partnership with CitySigns is to continue after the family signage and leading display firm was confirmed as the club's Official Signage Partner.
England Under 20s - who included Worcester wing Ben Howard - fell agonisingly short against world champions South Africa in the IRB Junior World Championship, losing 31-24 in La Roche-sur-Yon on Sunday.