FIFA's monitoring of World Cup warm-up matches revealed no suspicious betting linked to match-fixing.
Several friendlies before the 2010 World Cup, including some involving host South Africa, were later found to have been fixed by corrupt officials.
FIFA security director Ralf Mutschke says "because of this experience" his team monitored betting markets on 98 matches played from May 15-June 11.
Mutschke says in "none of those we have an indication of a fix."
Those matches include Nigeria's 2-2 draw with Scotland, which was played in London after widespread reports of an attempted fix.
FIFA has set up two confidential hotlines — one for players and officials, one for general use — to report World Cup suspicions.
Mutschke says "we have not received any kind of hint, or any kind of approach since the kickoff."