Two matches at Wimbledon this year are under investigation after "possible irregular betting patterns".
The matches, which were reported to the International Tennis Integrity Agency (ITIA), are an early-round singles match and a men's doubles contest.
On the singles match, a five-figure sum was bet at the end of the second set on the exact result.
During the doubles match, a winning bet was placed as the favourites, who eventually lost, took the first set.
It was reported in the German newspaper Die Welt that a German player was involved in the singles match in question, but was not themselves under investigation.