One of Belgium's key attacking threats is a doubt through illness as the world's number one ranked team get set to face Spain.
Eden Hazard is a doubt for Belgium's friendly with Spain, whose center back Marc Bartra is expecting the European champion to be sternly tested by the world's number one ranked team in Brussels on Tuesday.
Chelsea attacking midfielder Hazard did not train for Belgium on Sunday because of illness, while striker Laurent Depoitre was also missing from the session with an ankle injury.
Belgium goes into the match unbeaten in five games, having produced a fine demonstration of its quality on Friday with a 3-1 defeat of Euro 2012 finalist Italy.