Lasmar, who operated on Neymar on March 3, said he speaks "two or three time a day" with the physiotherapists working with the Brazil and Paris Saint-Germain player.

"For now, everything is going well, they tell me every detail of Neymar's recovery," Lasmar told French sports daily L'Equipe.

"They are working hard and in a very professional way so that he can return as quickly as possible and, above all, so there won't be any further problems for his foot or posture." 

He added that he planned to reassess the injury in mid-April.

Neymar, who missed Brazil's 7-1 semi-final thrashing on home soil by Germany through injury four years ago, is key to his country's hopes at this year's World Cup, which starts on June 14.

At the time of the operation, Lasmar said Neymar would be out for between "two-and-a-half to three months".

The 26-year-old, who joined PSG for a world-record 222 million euros ($264 million) from Barcelona last year, suffered a fractured bone in his right foot last month in a match against Marseille.

Record five-time winners Brazil open their World Cup campaign against Switzerland in Rostov on June 17, ahead of further Group D matches with Costa Rica and Serbia.