Floyd Mayweather Jr. is a gigantic basketball fan. Turns out, not all basketball fans are fond of Mayweather.

Mayweather attended game 5 of the Grizzlies-Warriors playoff series Wednesday night in Oakland. Mayweather, after arriving late to the game, was shown on the big screen. Instead of cheering for Mayweather, the fans at Oracle Arena voiced their displeasure with the boxer.

Mayweather apparently reacted to the booing with a smile and a laugh. 

Then, when the Warriors' team Twitter account shared a photo of Mayweather and welcomed him to the game, followers of the team responded with less than enthusiastic responses.

Here's that initial Tweet...

And here are some of the negative responses...

Mayweather wasn't the only one smiling at the negative reception. Apparently, Filipino fans of Manny Pacquiao were also happy to hear the chorus of boos on Wednesday night. Though their Tweets below aren't in English, it's not very difficult to gauge the mood of them.

Warrior fans aren't Mayweather fans, apparently.  (Getty Images)
Warrior fans aren't Mayweather fans, apparently. (Getty Images)