King's Lynn joint boss Kevin Boon admitted today the Norfolk Senior Cup semi-finalists face an anxious injury wait over 28-goal striker Jack Defty ahead of Saturday's FA Vase tie at Norton & Stockton Ancients.

Town's influential captain was withdrawn at the interval during Tuesday's Senior Cup quarter-final 2-0 win at Wroxham and the Linnets also have major injury concerns over Luke Thurlbourne (ankle) and Steve Spriggs (groin).

Lynn head to the north east bidding to reach the last 16 in the national competition with Boon revealing the next 48 hours are critical.

'All three will be getting intensive treatment,' said Boon. 'Jack is a major doubt. We just have to see how they respond to treatment but the next 48 hours are critical. Jack felt something at the top of his hamstring at half time so we took no precautions and brought him straight off, but we have some good lads in the squad and if we have to go with other players then we have full confidence in them. Chris Bacon, I think, should be eligible now as he was signed before the last round so that is something we just need to check with the FA.'

Town's triple injury blow marred an impressive Trafford Park display that clinched a home semi-final against lower league Thetford for a place in this year's Carrow Road showpiece final.

'We decided to go with a strong line up because we looked at the draw and, with due respect to Thetford, we felt there was an opportunity to get through,' he said. 'But we know we will have to be professional and treat them with the utmost respect.

'There was a few things said in the build up from the Wroxham end and I hope we have put that to bed now. We have beaten both Dereham and Wroxham away - who are the two best Norfolk sides in the Ridgeons Premier Division - and also Yarmouth and Gorleston at home. I don't think anyone can say there is any difference between the leagues now when you look at the fact there are four UCL clubs still in the FA Vase and only one from the Ridgeons.

'The first 20 minutes were very physical and we had to come through that period before we were able to play. We felt we should have had a clear penalty when Robbie Harris was taken out, but Pat Bexfield has played on and chipped it in from about 25 yards. That was a minute or so before the break and that just gave us a lift. We told them to keep playing, keep disciplined, at half-time and they responded superbly.'