Walcott describes the midfielder as "fearless".
And he added: "Jack is an absolute dream to play with.
"Especially when you play on the right because he has got an absolutely gifted left foot. He can just ping it over to you and he spots the ball that no one else would - apart from Cesc Fabregas.
"Cesc spots everything. But Jack breaks down the play very well too and I'm sure, if given the role, he will grab it with both hands because, as I say, he's the kind of player who plays with no fear."