As the number of suspected cases of match-fixing in tennis soars, the head of the ATP says more money needs to be given to the agency working to combat corruption.

Chris Kermode, the ATP's president and chief executive, and Nigel Willerton, director of the Tennis Integrity Unit, addressed a panel of UK lawmakers on Wednesday amid allegations of match-fixing and corruption in tennis.

Willerton said the number of alerts of suspicious activity passed to the TIU has increased from 14 in 2012 to 246 last year.

The TIU is funded by governing bodies and operates on a budget of $2 million. Just 0.4 percent of the ATP's turnover goes to the TIU.

Kermode said he agreed that wasn't enough, adding "we will spend whatever is needed to tackle the problem."