Brazil head coach Tite admits he is worried about the fitness of Neymar after the Paris Saint-Germain forward damaged the same metatarsal he broke last February.
Neymar limped out of PSG's Coupe de France victory over Strasbourg on Wednesday following a robust challenge from Moataz Zemzemi.
Subsequent tests revealed the 26-year-old had suffered a "painful recurrence" of the foot problem that kept him out for almost three months in 2018.
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The extent of his latest injury remains uncertain, with Tite keeping his fingers crossed that his talisman will only be sidelined for a short period.