At the final whistle, Neymar sat down on the grass and wept, with the emotion of victory hitting home after the tense Group E contest at the Saint Petersburg Stadium.
Should Neymar not be fit, Coutinho could be moved into his role on the left of a front three with Tite bolstering his midfield.
Even before his latest setback, there were doubts over Neymar's fitness heading into the World Cup after a three-month layoff.
The Real Madrid goalkeeper Keylor Navas was a key player in Costa Rica's quarterfinal finish in 2014.
Real Madrid goalkeeper Keylor Navas has revealed that he was more scared of walking the red carpet at the Cannes film festival than facing Liverpool's lethal striker Mohamed Salah.
The Costa Rican has been in outstanding form this season but is currently struggling to recover from a muscle strain which he picked up in training.
Real Madrid goalkeeper Keylor Navas is on the verge of breaking Iker Casillas' record of the highest non-goal streak by a Spanish team in the La Liga.
Keylor Navas will compete with Iker Casillas for the goalkeeper's jersey in Carlo Ancelotti's side, with Diego Lopez expected to leave the club.
In a World Cup where goalkeepers have done well, USA's Tim Howard made a record number of saves (16) in his team's pre-quarters clash vs Belgium.