Rio de Janeiro, Brazil:AC Milan forward Ronaldo will need two weeks to recover from a knee injury, Brazil's national team doctor Jose Luis Runco said on Friday.
Ronaldo arrived in Rio de Janeiro on Friday and headed straight to a clinic in the upscale Barra da Tijuca neighborhood, according to the O Globo Web site.
"We will apply a technique called Growth Factor to accelerate his recuperation," Runco told O Globo. "It's a genetic therapy. It would be ideal for him to stay in Rio for at least a week."
Ronaldo's knee problem ruled him out of Milan's first two games of the Serie A season _ as well as the European Super Cup win over Sevilla last week.
Milan coach Carlo Ancelotti had earlier said he expected Ronaldo back for the team's next game against Siena on September 15 - or when the squad opens defense of its Champions League title against Benfica three days later.
Ronaldo transferred to Milan from Real Madrid in January and was ineligible to play for the squad when it won the Champions League last season because he began the competition with the Spanish club.