Tennis chiefs will consult British horse racing security experts as part of a probe into suspicious betting.
Davydenko's defeat against world number 87 Vassallo was a shock
Betfair last week voided the market on Nikolay Davydenko's match with Martin Vassallo at the Poland Open because of concerns over unusual betting activity.
The ATP Tour launched its own probe as a result and a spokesman told the Guardian: "We plan to meet members of the British Horseracing Authority.
"We're keen to utilise their experience to help us with this investigation."
The HRA's security unit is led by former detective chief superintendent Paul Scotney.