An emotional Neymar cried as he recalled the challenge that ended his World Cup on Thursday and said he felt blessed not to have ended up in a wheelchair.
Former Brazil striker Ronaldo has accused Colombia's Juan Zuniga of an "evil, violent" tackle that has put Neymar out of the World Cup and said on Saturday he favoured tougher sanctions against violent play.
Brazil forward Neymar was taken to hospital after being injured in the closing stages of the 2-1 World Cup quarter-final win over Colombia on Friday that kept the hosts on course for a sixth title.
Brazil's Neymar has been banned for four matches after being sent off at the Copa America and will play no further part in the tournament, the South American football federation CONMEBOL said on Friday.
Manchester United suffered their third defeat in eight days as Watford handed Jose Mourinho his worst run as a manager in a decade. Goals from Etienne Capoue, Juan Zuniga and a late penalty from Troy Deeney overwhelmed the visitors, who had levelled with a solitary strike from Marcus Rashford.
Another match, another defeat for Jose Mourinho. Sunday's 3-1 loss at Watford was United's third in eight days and sent statisticians scrambling to find out when the 'Special One' had last been such a Beaten One. The answer was 2006. While Mourinho did lose three consecutive games last year with Chelsea, one of those was after a shootout in the Capital One Cup.
He was a pale shadow of the crowd-pleasing showman widely recognised as the heir to Lionel Messi and Cristiano Ronaldo as the greatest player in the world.
Substitute Costa slipped the ball past the keeper from close range in the 48th minute of the second half to break the deadlock and extend Brazil's winning run to 11 matches.