"We haven't spoken about (it being a must-win game)", he told reporters after a training session.
The Liverpool forward came on after 68 minutes of play in the World Cup finals group-stage encounter, with the scoreline locked at 0-0. It's still goalless here against a typically defensive Costa Rica.
7 - While it clearly was the late show from Brazil, the statistics back it up, too.
What a day for Brazil and the team's star Neymar.
Neymar was back in training for Brazil on Wednesday ahead of their World Cup clash with Costa Rica, 24 hours after limping out of a session with an ankle problem.
"Neymar is one of the best players in the world and it's a great plus to have him in the team", Coutinho continued.
Serbia have three points in the bag after beating Costa Rica but this is a very different test for them. "We need to be 110 per cent to win our matches". "We have our own strategy and we will see what happens".
The second match of the day wraps up Group D action Iceland taking on Nigeria.
Neymar will play in Brazil's vital World Cup match against Costa Rica on Friday (Jun 22) despite injury fears, coach Tite has confirmed.
The Swiss are unbeaten in their last six matches, including draws with two of the heavy favourites, Brazil and Spain, while the Serbs have an attacking reputation having scored in every qualifier, averaging two goals per game. "We saw Switzerland were able to take a point from Brazil".