Heidi Klum and her young boyfriend got rather cozy at the U.S. Open

Heidi Klum spent her Labor Day touching her young boyfriend at the U.S. Open.

The 41-year-old supermodel took in the tennis action with her 28-year-old beau, Vito Schnabel, who, of course, is an art dealer.

And the two could barely keep their hands off each other, as you can see in the video above.