Indy 500 Winner Alexander Rossi: Chicks Slidin’ Into My DM’s Nonstop After Race

Alexander Rossi says there was 1 very unforeseen consequence to winning the Indy 500 … a gaggle of women SLIDING into his Instagram DMs … wanting to hook up!!

TMZ Sports talked to the 2016 Indianapolis 500 winner — who's 24 and single — in L.A. Monday … and asked if his lady situation has changed since winning one of the world's biggest races.

The answer … a resounding YES!!

Check out the clip!