The former Real Madrid striker has offered his support for the Blaugrana head coach who is currently recuperating in hospital after he underwent surgery on Thursday
It was announced on Friday that the coach had left the intensive care unit and will be spending a few more days in hospital recuperating.
Vilanova, who led Barcelona to their best-ever start in La Liga, suffered a cancer relapse and had to be rushed for an emergency surgery procedure earlier this week.
"I am sure that Tito Vilanova will win this game! We are by your side, Tito!" tweeted Ronaldo.
The Brazilian is just one of number of big names to offer their support for Vilanova. Guti, Gaizka Mendieta, David Silva and Rafael Nadal amongst others wished the coach well and hoped for his speedy recovery.