According to MTO,
"the both actors got physical immediately before the Golden Globes started.
The reason for the altercation according to the insider, is that "Chadwick and Michael don't really like each other Chad is reported to be very arrogant and Michael doesn't fancy that.
Michael is known to be quite friendly and easy-going. He enjoys a cordial relationship with his female co-stars, Danai Gurira and Lupita Nyong'.
But the ladies aren't as free with Chadwick Boseman, and this is allegedly due to his arrogant behaviour".
According to reports
"Danai Gurira, Lupita N'yongo, Michael and Chadwick were in a staging area preparing to walk the red carpet when Chad and Michael started arguing."
" It wasn't an argument about anything particular, it's been building up for some time,"
" It was said that Security intervaned in the the fight before it could aggrivate but Chadwick reportedly refused to be around Michael for the rest of the evening. "