Barca winger Deulofeu is expected to make a first team breakthrough this season, while striker Krkic is on-loan at AS Roma.
On Deulofeu, Vilanova said: "We've known him for years. He has a lot of potential and his style of play makes it very obvious. But we can't rush the issue of his promotion [to the first team], his place is in Barça B and he needs to improve aspects of his play - it's a question that only he can work on, it's about his performances."
Of Krkic, he added: "He's a fantastic player, he was promoted when he was young. Whenever he's been given the chance to play, he's put the ball in the back of the net."