The college tennis player who called Michelle Beadle a "slut" has just emailed a personal apology letter to the ESPN star ... saying he was "extremely remorseful" ... TMZ Sports has learned.
A rep for the University of Texas at San Antonio confirms sophomore tennis player Gio Carrillo emailed the letter to Beadle moments ago.
As for the the contents of the letter, the rep tells us Carrillo wanted to keep it private ... but says it's essentially a full blown apology expressing that he's sorry and wants to learn from his mistake.
The rep also tells us the school did not demand the apology -- it was something Gio wanted to do.
We spoke with Beadle earlier today who tells us she doesn't want Carrillo kicked off the team -- she just hopes he grows up.