Brazil's World Cup campaign faces significant challenges due to the uncertain fitness of star forward Neymar, who underwent additional tests on his injured right leg on Monday. Hopes that the 34-year-old would return to training were dashed as he attended a clinic for examinations on his right calf. The Brazilian football confederation has yet to release the results of these critical tests.

Neymar, now participating in his fourth World Cup, has been out of action since injuring himself with Santos on 17 May. He has not engaged in any full training sessions since the five-time world champions began their World Cup preparations in Morristown, New Jersey, ahead of their match against Haiti on Friday in Philadelphia.

The urgency for Neymar's return has intensified following Brazil's disappointing 1-1 draw against Morocco in their World Cup opener on Saturday. The Selecao’s attacking struggles have amplified calls for a seasoned playmaker of Neymar's caliber, especially with the knockout stages approaching.

Despite being sidelined, Neymar still commanded attention at MetLife Stadium, where he was seen on the sidelines before kick-off, greeting celebrities like rapper Travis Scott and seven-time Super Bowl champion Tom Brady.

His inclusion in the squad by new coach Carlo Ancelotti sparked considerable debate in Brazil. While some believe the veteran could still provide vital experience, others argue he may have taken a spot from a younger, emerging talent.

In addition, three other players – Gabriel Magalhães, Bruno Guimarães, and Raphinha – trained separately on Monday to enhance their fitness.

On a personal note, Neymar and his partner, Bruna Biancardi, announced on social media that they are expecting their third daughter, adding a positive note amidst the uncertainty surrounding his injury.