Sources: LeBron James upset by boast

MIAMI -- Once friends and teammates, the relationship between Heat forward LeBron James and Cleveland Cavaliers guard Daniel Gibson was strained again Saturday following a party proclamation and a brief Twitter battle.

It began at a birthday party for Gibson and Cleveland-based DJ Steph Floss on Friday night. During the event, two witnesses told ESPN.com that Gibson made a reference to being the new king of Cleveland during a toast.

According to a source close to Gibson, James became upset upon hearing about the boast. The source said James and Gibson later resolved the issue because Gibson didn't mean to insult James.

But not before the drama unfolded in front of their more-than-1.5 million combined Twitter followers.

James tweeted Saturday afternoon: "I wake up this morning to hear somebody got real fly at the mouth at their party lastnight [sic]. I see where we stand now even though I sense it!"

He followed with: "Get out your feelings."

Meanwhile, Gibson posted several references to the incident on his Twitter feed, saying: "complaining about someones [sic] tweets is like complaining about the channel & you got the remote in your hands."

Gibson then wrote: "Life is too short to worry about what others feel & think about you.. So have fun #DoYou & Give em something to talk about [sic]."

A few hours later James posted the message: "The Air is Cleared."

This is not the first time James and Gibson have clashed.

After Cleveland and Miami first met in December, Gibson became defensive when he was asked about smiling at James as he was talking to the Cavs' bench during the Heat's 118-90 win. Gibson indicated their friendship had been hurt by the comments James made that night during the game.

However, after speaking with Gibson on the phone two days later, James said everything had been patched up. Now, it seems like it has happened again.

Brian Windhorst covers the Miami Heat for ESPN.com.