Arsenal boss Mikel Arteta says William Saliba will start the derby tomorrow against Tottnham.
It will mark Saliba's first North London derby.
Asked if there were any doubts about the Frenchman, Arteta said: "No this is football and Willy has shown what he's capable of in the past few months.
"That doesn't mean that the line up is always going to be in the same direction, but he's been so good from my side I have no doubts."
On the derby itself, Arteta also said: "No this is football and Willy has shown what he's capable of in the past few months. That doesn't mean that the line up is always going to be in the same direction, but he's been so good from my side I have no doubts."