Atletico Madrid full-back Filipe Luis is set for an extended spell on the sidelines after sustaining a heel injury in training.
The Brazil international had only returned to full training after three weeks out with a hamstring problem picked up in the 1-0 La Liga defeat at Espanyol on Dec. 22.
However, scans have shown that the 32-year-old has tendinitis in his left heel and will undergo treatment on the issue, but no timescale has been put on his recovery.
Pele will be unable to attend a London tribute dinner in his honour on Sunday after he collapsed in Brazil with severe exhaustion.
The Football Writers' Association said in a statement that the three-time World Cup winner with Brazil, now aged 77, would not be able to come to the event.
A spokesman for Pele, however, denied the football great had been taken to a hospital, as was first reported by the FWA.
"I have no idea who made up that news. He went to Rio de Janeiro and back [from Sao Paulo]...
If you love football, or even just possess a passing interest in it, you adore Ronaldinho. Upon his retirement, there has been a tendency to lament his career as a mix of "what ifs" but such a solemn reaction doesn't do justice to the greatest player of his generation. Don't be sad it's over, smile because it happened.
For many 20-to-early-30 somethings, Ronaldinho was the original go-to guy on YouTube, a mesmerising mix of outrageous tricks, flicks and goals interspersed with the now-familiar trashy...
Now it's official: Ronaldinho will not play any more competitive football.
His older brother and agent, Assis, has announced that farewell matches and events will take place after the World Cup, but one of the most gifted players the game has ever seen will not be kicking any more balls in anger.
In truth, this only makes official what everyone already knew. Ronaldinho has not been seen in competitive action for more than two years. His last serious match was a Brazilian league game for Fluminense...