The European Sport Security Association (ESSA) provided statistics for the first quarter of 2017.
It shows that tennis was involved in 45% of reported cases of suspicious betting, which could be an indication of match fixing.
The total number of suspicious cases was 27. 12 of them relates to tennis.
The remaining 15 accounted for:
football and volleyball – 4 cases for each;
basketball and snooker – 2 suspicious games for each;
box, handball and hockey – 1 suspicious game for each.
However, the ESSA notes that the chairpersons of tennis federations are taking active actions against fixed matches. This is reflected in the relative figures: comparing to 80% of suspicious cases in 2016, now tennis accounts only for 45% of reported cases.