Criminals will attempt to manipulate World Cup matches, FIFA security chief Ralf Mutschke has told German paper Frankfurter Allgemeine Zeitung.
Mutschke, a former Interpol director and senior manager at the German Federal Criminal Police Office, said efforts to fix matches at the tournament in Brazil had to be expected.
"We must clearly assume that organised crime will try and fix matches at the World Cup," he said. "At this event, bets will be placed at a great rate and a large profit will be made."
But Mutschke said every possible measure to prevent such fixing would be put in place, adding: "We will have security officers in all 12 World Cup stadiums.
"We will monitor all matches on the betting market, we will be in contact with all bookmakers, screen the social networks and the relevant boards for hints. We will analyse individual plays during games."
And he said that should strong suspicions surround a certain match, it could be called off. "Everything is possible," he said.