Belgium’s top scorer Romelu Lukaku has withdrawn from their trip to the U.S. this week and will miss World Cup warm-up matches in Atlanta and Chicago, Reuters reported ​​​​​​. 

The 32-year-old Lukaku, who has netted a record 89 goals in 124 internationals, has elected to work on his fitness and will skip Saturday’s clash against the U.S. and another friendly against Mexico.

“Romelu prefers to train in the coming period with the aim of further optimising his physical readiness,” the Belgian Football Association said in a statement on Tuesday, according to Reuters.