Paul Lambert insists whoever he selects this weekend is good enough to clinch an FA Cup quarter-final spot against Leicester City at Carrow Road.

The Canaries' boss admitted at his pre-match press call on Friday morning he has a few injury concerns ahead of the Foxes' fifth round visit, but Lambert's faith in his squad remains undiminished. Lambert also confirmed Tottenham have given permission for Kyle Naughton to potentially feature against the club he was on loan against last season. The full-back took a bang on the side of his knee towards the end of last weekend's Premier League win at Swansea and will be monitored over the next 24 hours before Lambert makes a final decision on his fitness.

James Vaughan is in the squad and pushing to play some part after coming through 90 minutes in a midweek reserve outing as he steps up his return from knee ligament surgery. Central defenders Zak Whitbread and Dani Ayala (hamstring) are ruled out along with Marc Tierney (groin). Lambert revealed he is considering whether to recall Jed Steer in place of John Ruddy after his impressive senior debut in the previous round's win at West Brom.

'There is a good chance that Jed will play. I'll decide tomorrow (Saturday),' said Lambert. 'There is one or two that are carrying little things at the minute so we will just see how they are and then I'll make a decision what we are going to do. Adam Drury has a groin so I'll just see how he is feeling. I don't put any pressure on them and hopefully there'll be okay. Benno (Elliott Bennett) seems to fine and the team I pick will be strong. Zak is not available. He is doing alright at the minute but I just think this one is too early for him.

'James is in the squad. I think he is looking a lot better than he was a few weeks ago. He did fine against West Brom and I'll see how he comes through today, but he will be in the squad. Most of the squad have played in the Premier League so there are not many who haven't tasted it. They know whatever team we pick, what I expect.'

Lambert reiterated Manchester United's pending league visit is in his thoughts, but the Scot also wants cup progress against the Championship big spenders.

'You give it every respect,' he said. 'There'll be some changes in the team, but it won't be a weakened side that is for sure. It's a game we'll go and try to win. There is a chance to get through. I won't treat it lightly. I'm sure everybody knows that Premier League survival is our priority, but any team I pick tries to win a football game. The Manchester United game takes care of itself. They are going for the title, they are playing really well. I watched them last night (Thursday) and I thought they were terrific the way they played. Tomorrow is the most important game for me.'

Lambert also revealed midfielder Jonny Howson may be considered for next week's scheduled Premier Reserve League home game against Arsenal for his first outing in a Norwich shirt since his January move from Leeds. Howson has not played since a knee injury in December.