AS Roma manager Jose Mourinho encouraged Swiss international Granit Xhaka to get vaccinated after the Arsenal midfielder returned a positive COVID-19 test this week.
The Switzerland captain, 28, was ruled out of Wednesday's friendly with Greece after testing positive for the coronavirus on the day of the game.
A spokesperson for the national team told Swiss newspaper Blick that Xhaka was not vaccinated.
"Get the jab Granit and be safe," Mourinho told Xhaka in a comment on a post on Instagram .
Xhaka had been linked with a move to Mourinho's Roma in the off-season but British media reported Arsenal had turned down a bid from the Serie A club.
Switzerland will host European champions Italy in their Group C World Cup qualifier on Sunday before taking on Northern Ireland in Belfast on Sept. 9.