" I personally have never experienced it but, listening to the players talking, it seems it goes on," said Henman, who ended his 14-year career at the weekend by helping Britain to a 4-1 win over Croatia in the Davis Cup at Wimbledon.
" We've got to be very careful, very vigilant about it as tennis doesn't want to be associated with that."
Henman's comments come a month after the ATP began investigating possible irregular gambling patterns on a match at the Sopot Open in Poland between world number four Nikolay Davydenko and Martin Vassallo Arguello of Argentina.
Davydenko denies any involvement and will give his version of events to the ATP next month.
Etienne de Villiers, the chairman of the ATP, said in a statement: " All professional sport needs a level playing field in order to maintain its appeal and integrity.
" This is especially true for tennis which is a one on one gladiatorial contest. The ATP, and all involved with tennis, therefore treat any form of corruption extraordinarily seriously and we have established rigorous procedures and programs; and severe penalties for transgressing our codes of conduct.
Reuters
Henman warns tennis must guard against gambling scams
Tim Henman has warned that increasing betting in tennis could risk the integrity of the sport. Henman, 33, the former world number four, says in an interview with BBC television's Inside Sport program to be broadcast on Monday that he has heard of players being asked to influence the outcome of matches.
