Geneva police had to break up fights outside a polling station set up for Brazilians on Sunday.
Some supporters of the two candidates came to blows.
Although there were no arrests, witnesses say the atmosphere was tense.
The result from the Geneva poll showed the race was virtually neck and neck.
The contender, Lula da Silva beat the incumbent Jair Bolsonaro by just 52 votes out of a total of nearly 4,000 cast.
Govt to delay funding decision for UNRWA
The Swiss government is putting off a decision on whether to re-start funding to the UN Palestinian relief organisation UNRWA.
Potential terrorist arrested in neighbouring France
A teenager threatening to attack the Paris Olympics has been arrested in neighbouring France.
New plan to pay for P+R in France
The canton of Geneva is proposing a new plan on how to finance Park and Ride schemes in neighbouring France.
Nestlé throws mineral water away
The Swiss food giant Nestlé has been forced to destroy several batches of its mineral water brand, Perrier, due to a bacterial contamination.
Sheep head prankster found
The person responsible for placing two sheep heads in the toilets in a Geneva school has been identified – and the investigation has been closed, according to the police.
Former president says Switzerland should join EU
A former member of the Federal Council says the only way Switzerland will achieve its European goals is by becoming a full member of the European Union.
