Neymar has thrown his weight behind right-wing senator Flavio Bolsonaro ahead of Brazil's election. The country's best-known footballer made his support public at a sensitive moment in the campaign. Brazil is heading into a runoff vote, and the race is expected to be tight. The Bolsonaro camp faces former president Luiz Inacio Lula da Silva in that decisive round. An endorsement from a sports figure with Neymar's reach can matter in a contest this close. His backing for Flavio Bolsonaro links him directly to the senator's bid rather than only to the broader ticket. Neymar has previously been associated with positions close to the Bolsonaro family, so the move surprised few observers. Attention now shifts to how much influence a celebrity endorsement can actually have at the ballot box.