The England international has been sidelined for the past five months with a knee injury, but played 45 minutes for the under-21s on Thursday night.
"Following that game we did really well as a team but we need him because he can always make the difference with his speed, with his passing and obviously with his finishing. He can [make] absolutely a great impact for any team in the world so we are really pleased that he's back.
"But I think he needs some time to get through training and to have some good games, but I'm really pleased for him that he got 45 minutes against Fulham. That is a step back to absolutely full fitness."