The key group of 16 suspect players had not been targeted in any crackdown, it said, questioning the effectiveness of the Tennis Integrity Unit (TIU), the sport's anti-corruption body.
Kermode said the TIU had won 18 convictions including six life bans since it was set up in 2008, adding it "has to find evidence as opposed to information, suspicion, or hearsay".
"let me just say that all of us here in tennis are absolutely committed to stamp out any form of corrupt conduct in our sport," he said.
"There is a zero-tolerance policy on this. We are not complacent. We are very vigilant on this."
Other allegations included that a confidential report in 2008 recommended investigations into 28 players "but the findings were never followed up", according to the BBC.
The sport introduced a new anti-corruption code in 2009 but after taking legal advice were told previous corruption offences could not be pursued retrospectively.
Mark Phillips, one of the investigators in the 2007 probe, told the BBC: "There was a core of about 10 players that we believed were the most common perpetrators that were at the root of the problem."
"The evidence was really strong, there appeared to be a really good chance to nip it in the bud and get a strong deterrent out there to root out the main bad apples."
The report added that the European Sports Security Association, which monitors betting for bookmakers, flagged up more than 50 suspicious matches to the TIU last year.
