The Anti-corruption Unit chief of the England and Wales Cricket Board (ECB) said match-fixing chances are higher in domestic county cricket than international cricket.
"From what I know, I would suggest that (fixing) is probably around the domestic game," former senior detective with the Metropolitan Police, Watts told BBC Sport.
"That's where some of the risks are, more so than the international arena. International players are under far more scrutiny than players in the domestic game. That's what would lead me to form that view," he felt.
"That's possibly where the threat may lie at the moment," he said. Spot-fixing rocked the cricket world last year when three Pakistani cricketers -- Mohammad Aamer, Mohammad Asif and Salman Butt -- were found guilty in a Test match at Lord's.