Brazil forward Estevao’s participation in this summer’s FIFA World Cup reportedly is in jeopardy due to a hamstring injury sustained during Chelsea’s weekend loss to Manchester United.

The 18-year-old prodigy suffered a Grade 4 hamstring injury and is “highly unlikely” to be ready for the start of the North American tournament on June 11, The Athletic reported on Wednesday.

Estevao limped off with the injury in the 16th minute of Chelsea’s 1-0 loss on Saturday and was in tears in the locker room after the match, according to coach Liam Rosenior. He reportedly underwent an MRI on Monday afternoon.

Estevao has registered eight goals and four assists in 36 appearances during his first season with the Premier League side, including three goals in seven Champions League matches.

Internationally, Estevao has tallied four goals in his last four appearances with the Brazilian national team and has 11 career caps.

Brazil, currently ranked No. 6 in the world, is in Group C for the World Cup with Morocco, Haiti and Scotland. The five-time World Cup champions open play against Morocco on June 13 in East Rutherford, N.J.

–Field Level Media