Neymar is 'working hard' to get his foot back to full fitness while Brazil train in preparation for their second World Cup clash against Costa Rica

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After failing to live up to pre-tournament hype with a disappointing 1-1 draw in their World Cup opener against Switzerland, Brazil need to quickly find a key to unlock opponents happy to sit back and defend for most of the game.

The five-time winners showed encouraging signs in the first half of Sunday's game as they took the initiative, although their only way past Vladimir Petkovic's disciplined outfit was thanks to a stunning long-range strike from Philippe Coutinho.

Brazil's frequent attempts to play into the penalty area were repeatedly thwarted by a resolute Swiss defence as a nervous-looking Neymar failed to shine, leaving man-of-the-match Coutinho to do all the work in engineering attacks.

Neymar took to Instagram to tell followers he is 'working hard' to get his foot to full fitness

Brazil geared up for their next World Cup clash against Costa Rica on Friday

Roberto Firmino controls the ball during a training session at Yug-Sport Stadium in Sochi

Real Madrid wing back Marcelo lets out a smile as the spirit in the camp appears high

Meanwhile, on Monday, Paris Saint-Germain superstar Neymar took to Instagram to show fans he was 'working hard' to get his troubled right foot back up to speed ahead of their next clash.

Neymar broke his foot back in February while playing for the Parisians, but showed on social media that he is still receiving treatment to get it back up to 100 per cent.

The £198million man will face a similar challenge finding space in attack against their next opponents Costa Rica, who play with a five-man defence and were only beaten 1-0 by Serbia due to an outstanding free kick from Aleksandar Kolarov.

Coach Tite said his side suffered from anxiety during the opening game, the first time Brazil have not won a World Cup opener since 1978, urging them to keep their heads when they got into shooting positions.

'We need to stay cool when we shoot and be more precise,' he said.

A lot of the focus after the game was on whether Brazil defender Joao Miranda had been fouled by Steven Zuber when he headed in Switzerland's 50th-minute equaliser, while a decision to deny Gabriel Jesus a penalty was also heavily scrutinised. 

Renato Augusto (L) and Filipe Luis in action during a training session on Monday afternoon

Casemiro, Filipe Luis, Fred, Philippe Coutinho and Fernandinho share a laugh during training

Costa takes on Luis during training as he vies to push his way into the starting line-up

An equally big problem for Brazil was coping with frequent tactical fouls meted out by the Swiss, particularly on Neymar, which interrupted their attempts to create attacks.

Miranda said the squad were not too concerned by their underwhelming start, however, pointing out that his side were in good company after Germany lost to Mexico and Argentina and Spain were held to draws in their first games.

'The draw will not shake us, some good teams have started the tournament losing, we're focused on our next game, where I'm sure we will play well and go all out for the win,' he said.

Striker Jesus said the side did not need to change too much for their next game.

'We need to play in the same way against Costa Rica, we played well, especially considering it was our first game, but unfortunately we couldn't win. Life goes on. We drew, we didn't lose,' the Manchester City forward said.

'Now we must keep our heads down, as we want to win our next game.' 

Manchester United-bound Fred controls the ball during Monday afternoon's session

Marquinhos of Brazil takes five and watches on during the relaxed session in Sochi