Tommy Hilfiger -- I Want to Sign Tom Brady ... Gronk, Not So Much

He just signed Rafael Nadal, but mega-designer Tommy Hilfiger tells TMZ Sports there's another major athlete in his sights ... Tom Brady.

Hilfiger was leaving Craig's in West Hollywood Tuesday night when we asked if he'd ever consider signing a guy like Rob Gronkowski to a modeling deal.

But Tommy wasn't into Gronk ... Hilfiger made it very clear there's only one guy on the Pats he's interested in -- QB1.

FYI -- Brady has a few modeling deals under his belt (Under Armour, Stetson cologne and UGG boots) ... but nothing as big as a Hilfiger contract.