The Juventus striker termed the coronavirus crisis as a 'very difficult moment' and asked people to do their bit.
Ronaldo shared two pictures sporting a mask denoting Portugal and Italy flags to show solidarity with the two countries.
"In this very difficult moment for our world it is important we unite and support each other. Let's all do what we can to help. #beyondthemask #nevergiveup," Ronaldo tweeted.
On March 28, Juventus announced that all those associated with the club have decided to negotiate their wage structure in a bid to combat COVID-19.
Soon after that, Serie A clubs unmously agreed to cut the salaries of first-team players by up to one-third.
( With inputs from ANI )