Common Says Serena Got Screwed, Ref Shoulda Let Outburst Slide

Awwww, the widdle U.S. Open judge has hurt feewings??

SUCK IT UP, PAL, YOU DON'T DOCK SERENA WILLIAMS A FULL GAME PENALTY!!

At least, that's how Common feels about the drama involving his ex-girlfriend -- telling TMZ Sports the judge shouldn't be so damn sensitive when a passionate player blows up on him.

Remember, Carlos Ramos was so offended when Serena called him a "thief" during a heated moment in the U.S. Open final, he punished her by penalizing her 1 full game.

"You gotta rise above it as a referee," Common said ... "She was having a time at that moment, she should be allowed that space. She's a passionate athlete."

Common also explained, "I think the referee should have gave her some leeway. You could see she was having an emotional time and because she is that great and what she means to the sport, you don't want to see the match end because or things get swayed one way because of a referee."

"You should let the athletes play it out."