The International Betting Integrity Association (IBIA) reported 88 suspicious betting alerts in the second quarter, with football the sport of most concern.
Football was responsible for 32 alerts during Q2, ahead of tennis with 27, horse racing on 12 and eight for table tennis. A further four alerts were related to esports, three for basketball and one each for handball and greyhound racing.
The total number of suspicious betting alerts was up significantly from 38 in Q2 of last year.
In terms of location, events in Europe generated the highest number of alerts with a total of 46, with 18 of these for football and 12 for tennis.
The highest number of alerts were registered in Poland, with six alerts being reported in the quarter, all of which were related to table tennis. Denmark placed second with five alerts, all for tennis.
Elsewhere, 18 alerts were raised in Asia, all of which were related to suspicious betting on football. Mongolia topped the list here with four alerts, ahead..