According to official Arsenal sources, Xhaka and Barogun are infected with COVID-19.
In the early hours of this morning, Arsenal were knocked out by Nottingham Forest in the FA Cup, in which Xhaka, Barogon, Smith Ronaldo and Fuan Jianyang were all absent.
Arsenal confirmed that Xhaka and Barogon missed the game because they tested positive for COVID-19, while Kenyo Fuan and Smith-Royce were sidelined due to groin injuries and calf muscle strains, respectively.