The Gunners lead the Premier League on December 25 for the fifth time, but they have yet to convert that into a title win.
Calvert-Lewin, a free summer signing from Everton, has now scored in five straight Premier League games for the first time since October 2020.
That was all Arsenal, who had won their last 18 matches when going ahead this season, needed to reclaim the Christmas number one spot for the third time in four years.
Ruben Amorim says Kobbie Mainoo “needs to fight for his job” and hinted Manchester United might be able to bolster their squad in the January transfer window.