Ian Henderson will be out for two months after scans confirmed the original diagnosis of medial damage to his knee. The Canaries winger was stretchered off after a challenge by Rotherham's Michael Keane midway through the second half of Tuesday's Carling Cup clash at Millmoor.

Ian Henderson will be out for two months after scans confirmed the original diagnosis of medial damage to his knee.

The Canaries winger was stretchered off after a challenge by Rotherham's Michael Keane midway through the second half of Tuesday's Carling Cup clash at Millmoor.

It was a challenge that incensed Worthington at the time - and the feelings had yet to dissipate.

“He's out for eight weeks and although that's not as bad as we anticipated the challenge still rankles,” said Worthington. “But there's nothing we can do about it now and we have to move on. He has been diagnosed and we get on with it.”

The 21-year-old Henderson does not require surgery on his knee but will need rest followed by intensive rehabilitation.

Henderson joins Darren Huckerby and Adam Drury, who undergoes surgery today to tidy up ankle damage, on the injury list.

Huckerby, who has a groin injury, could be back in time for next Sunday's home game against Burnley, while Drury is expected to be out for two to three weeks.

“It's a tidy-up for the meantime and then we'll monitor it as we go along,” said Worthington of Drury.

Lee Croft, who missed the Rotherham trip with a thigh injury, will be given the chance to prove his fitness ahead of the long trip to Plymouth.

Goalkeeper Joe Lewis resumes training on Monday, having suffered a fractured cheekbone while playing for the reserves earlier this month.

Striker Peter Thorne, sidelined for much of the current campaign, is also on the road to a complete recovery, having started his first match of the season at Rotherham, scoring only his second senior goal for City before being replaced at half-time.

“The plan was for Thorney in his first match situation since coming back into training to give him 45 and bring him off,” said Worthington.

“And that worked quite well. It was good for him. We could have given him 45 or an hour at Northampton (for the reserves), but he might not have benefited from it much and nor would we. So I think it was the ideal situation to get the best for both parties.”

With the injuries slowly piling up, Worthington will be keeping a wary eye on the disciplinary situation, with Dickson Etuhu and Lee Croft both on three bookings, and Youssef Safri, Jason Shackell and Carl Robinson all on two apiece.

The stats show City sixth in the disciplinary table - with Saturday's opponents Plymouth second - with 18 yellow cards in 10 league and cup matches.

“We have two or three people I think on three bookings and with the injury situation we can do without any suspensions at this moment in time,” said Worthington. “It's up to five, so we're still a little way clear of that yet.

“I'm not saying it's easy in any way, shape or form but I think referees could get help from their assistants more than they do.”