Neymar will be further undergoing a series of thorough medical tests to determine his fitness ahead of the new seasonReuters

Brazil striker Neymar has finally joined his Barcelona teammates in training after successfully recovering from a back injury he sustained in the 2014 World Cup.

The 22-year-old suffered a fracture in the vertebra after being kneed by Juan Zuniga in the back during Brazil's quarter-final clash against Colombia.

Neymar, who could do nothing but watch as his team suffered a humiliating 7-1 defeat at the hands of eventual champions Germany, was granted permission to train after he successfully passed a medical at the Nou Camp.

"The four World Cup semi-finalists Leo Messi, Javier Mascherano, Dani Alves and Neymar all trained with their colleagues on Tuesday," read a statement in the club's official website.

"They returned to the club for their medical tests and all passed with flying colours, and are now set for three weeks of intense training in the build-up to the start of official matches in three weeks' time."

However, the Catalan club have stated that Neymar, who netted 15 goals in 41 appearances following his €87.2 million switch from Santos last summer, will be further undergoing a series of medical tests to make sure he is fully fit ahead of the new season.

"Neymar Jr will also be given a thorough examination by the Club's Medical Services to evaluate his recovery from the back injury he suffered against Colombia in the World Cup quarter finals," added the statement.

Meanwhile, Barcelona midfielder Xavi, who recently announced his retirement from international football, says that not being able to play alongside former Manchester United midfielder Paul Scholes is the only regret he has had in his 16-year career.

"When I think about all I have won with Spain and Barcelona and all they great players I have played with - it is impossible for me to have any regrets," Xavi told ESPN.

"Maybe one small regret is that I never got to play with Paul Scholes - but I was never going to leave Barcelona and he was never going to leave Manchester United."

Xavi claims that Scholes is the most complete central midfielder he has ever seen in the last two decades.

"In the last 15 to 20 years the best central midfielder that I have seen - the most complete - is Scholes. Scholes is a spectacular player who has everything," Xavi had said.