After Brazil failed to deliver in their opener with Switzerland this is a must-win affair for the Seleção with a tricky match against Serbia to come.
The world's most expensive player had been an injury doubt after hobbling out of training on Tuesday with an ankle problem, 48 hours after he was on the end of 10 fouls from robust Swiss opponents as Brazil opened their campaign with a disappointing 1-1 draw.
The World Cup match between Brazil and Costa Rica will be broadcast live on FS1.
The world's most expensive player, who joined Paris Saint-Germain for 222 million euros ($260 million) from Barcelona, only just made it to the World Cup after breaking a toe in his right foot on February 25.
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"Maybe we will cover him by two men. The players know what to do". However, due to his absences, Tite has announced that Fagner will replace the Corinthians right back.
One of the highlights of Costa Rica's qualifying campaign was a 4-0 crushing of the United States in San Jose that cost USA coach Jurgen Klinsmann his job.
"I haven't had to intervene at all".
Skipper Bryan Ruiz said Costa Rica were motivated at the thought of facing five-time world champions Brazil and were mentally prepared for the task ahead.
Asked if Neymar would feature were it not a World Cup finals fixture, Tite added: "Yes, yes". The 23rd-ranked team has always been a long-shot to win the Cup this year, having only progressed to the quarter-finals in 2014.
"We have prepared very well physically and tactically, so we will have to use that in tomorrow's game, as well as our psychological strength".