Derek Jeter tried to hit this

And came up with an epic FAIL!

Mariah Carey's ex was seen Friday night at Villa, trying in vain to hit on Sienna Miller, an insider at the club tells PageSix.com.

Uh oh. Alex Rodriguez is not going to be happy to hear about his boyfriend trying to meet other people. Especially right before they bunk down together again at Spring Training.

"Derek was trying to flirt with Sienna Miller but she didn't know who he was and could have cared less."

BURRNNNN. First this, then getting shot down. Bad week for Jetes.

Turns out Sienna has a serious boyfriend. Some dude named Rhys Ifans. Fuck if I know. More Sienna...

H/T: SI Extra Mustard