Gabriel Jesus was included in Arsenal's squad for the first time since November for Sunday's Premier League meeting with London rivals Fulham.
Arsenal made the short trip to Craven Cottage with the aim of restoring their five-point lead over Manchester City at the top of the division.
Manager Mikel Arteta said ahead of the game he had yet to make a decision on whether Jesus would be involved, having only returned to full training this week.
But the Brazil international, whose most recent club appearance came in a 2-0 win at Wolves on November 12, was named among Arsenal's substitutes.
Jesus had scored five goals in 14 Premier League appearances for Arsenal prior to sustaining a knee injury which required surgery while away on World Cup duty.
Leandro Trossard was deemed fit enough to start against Fulham after missing the 2-2 Europa League last-16 first-leg draw with Sporting CP in midweek.
Arteta made five changes in all from that match, with captain Martin Odegaard also returning after recovering from illness.
Eighth-place Fulham, who were seeking a first win over Arsenal in 10 league meetings, made two changes for the contest.
The big news was the absence of ex-Arsenal man Willian from their squad, with Bobby De Cordova-Reid coming into the XI. Tosin Adarabioyo replaced Issa Diop in the other change.
Manor Solomon, who had scored in each of his past five appearances in all competitions, retained his place in the starting line-up.
Arsenal had won all four of their away London derbies in the league this season prior to facing Fulham, doing so by an aggregate 8-0 scoreline.
Fulham XI: Leno; Tete, Adarabioyo, Ream, Robinson; Reed, Lukic; De-Cordova Reid, Pereira, Solomon; Mitrovic.
Subs: Rodak, Wickens, Wilson, James, Vinicius, Diop, Francois, Harris, Robinson.
Arsenal XI: Ramsdale; White, Saliba, Gabriel, Zinchenko; Odegaard, Partey, Xhaka; Saka, Trossard, Martinelli.
Subs: Turner, Tierney, Jesus, Smith Rowe, Holding, Tomiyasu, Jorginho, Vieira, Nelson.