Their results coming into Russian Federation weren't great and they were lucky not to lose by more than a goal to nil against Serbia on Sunday.
The cat was put amongst the pigeons in Group D last night as Croatia stormed to a 3-0 win against Argentina, and that leaves Iceland and Nigeria with a huge opportunity to progress to the knockout round. At 23.30 pm, Brazil will clash with Switzerland and today's final match is between Croatia with Nigeria at 12.30 am.
Coverage begins at 7 am ET on Thursday with Brazil and Costa Rica at Saint Petersnurg Stadium.
Neymar started practicing with the rest of the squad but left accompanied by a doctor about 30 minutes into the session in Sochi.
"Neymar felt some pain in his right ankle, so that's the reason he left training".
Four years ago, defeating Uruguay and Brazil in their group, reaching the quarterfinals, and along with a draw from England, Costa Rica's team will open their campaign against Serbia in the FIFA World Cup 2018 today on Sunday. Costa Rica doesn't have history on its side: Brazil have won nine out of 10 matches against Costa Rica, with its only loss coming in 1960 friendly.
Three matches will be played today in the FIFA World Cup.
"We're a national team and we've gotten people used to surprises".
Costa Rica and LAFC forward Marco Ureña told reporters this week that his side can spring an upset.
After taking on Costa Rica, Brazil will complete Group E by facing Serbia in Moscow.
"If we do the math and start playing for a draw then it will not be successful", captain Aleksandar Kolarov said. "He is a very important player for us".
Neymar sat out Monday's session after the Selecao were held to a 1-1 draw against Switzerland in their World Cup opener a day earlier, having come in for rough treatment.