Tennis legend Ivan Lendl -- the former #1 ranked player in the world and 8x Majors winner -- is unloading his INSANE Connecticut mansion ... and the 445 acres of land it sits on!!
TMZ Sports has learned the 61-year-old retired Czech-American tennis star listed the Cornwall, CT estate -- about a 2 hour drive from New York City and Boston -- and it's absolutely breathtaking.
Asking price ... $16.45 mil!!
The 18,000 square mansion boasts 10 bedrooms, 15 bathrooms and comes with every ridiculously lavish amenity you could ever want in a home.