Kathryn Mayorga had accused the Portuguese football star of rape in 2009.
Spain's Atletico Madrid, Italy's Inter Milan, and six English teams abandoned the breakaway competition after intense criticism.
"True champions never break!" Ronaldo said on Instagram with a photo of him training ahead of Sunday's Serie A game away to Cagliari.
Borussia Dortmund striker Erling Haaland struck in each half as they advanced to the quarterfinals after a 2-2 draw with Sevilla in their last-16 second leg to complete a 5-4 aggregate win.
Borussia Dortmund's Erling Haaland continued his prolific run in the Champions League by scoring twice as his side came from behind to earn a 3-2 win at Sevilla in a last-16 first leg.
The 35-year-old and his partner Georgina Rodriguez could both face a hefty fine if found guilty.
He won the Golden Boot as the top scorer and Golden Ball as the player of the tournament, a campaign regarded as one of the best individual World Cup performances of all-time.
Rossi, who died at the age of 64 early on Thursday, had been handed a three-year ban in the fallout from the "Totonero" scandal in 1980, but when the sanction was reduced to two years it gave him the opportunity to rebuild his reputation
Lazio enjoyed the luckiest of escapes as they qualified for the last 16 for the first time in more than 20 years after being held to a 2-2 draw at home by Club Brugge.
The 35-year-old has scored 450 goals for Real Madrid, 118 for Manchester United, 102 for Portugal, 75 for Juventus and five for his first club, Sporting.