The accolade comes from Sir Bradley Wiggins who also said the Manx-born cyclist was the "greatest sprinter".
Sir Bradley became the first UK rider to win the Tour de France in 2012.
His comments come ahead of a major cycling event on Sunday when Cav will attempt to break a Tour de France world record set 46-years ago.
Mark Cavendish has already won four stages at this year's tour, meaning he's currently level with Eddy Merckx on 34 wins.
There are two sprints still to contest so it's possible Cav could eclipse the Belgian rider and rewrite the history books
To celebrate, the Manx government's arranged a fan zone showing live Tour, big screen coverage.
Everyone's invited to attend the Villa Marina Gardens from 2pm, the government says there'll also be food and drink stalls.
Budget passes by 21 votes to 10
Don't park at the Bottleneck tomorrow!
Yellow ice warning issued by Met Office
Met Office issues amber overtopping warning
Two ferry sailings cancelled, two more at risk
Plans unveiled for new Patrick wetland
Police looking for witnesses after collision in Ramsey
Over 21,500 passengers have used the number 8 bus
