If Holgate has made an official complaint, and it is proven to be false due to misunderstanding what was actually said, I think he should make a public apology to Firmino. Doesn't have to be anything dramatic, just "I thought in the heat of the moment he said something, it is now clear he didn't, and I apologise for the misunderstanding." Less chance for mud sticking if Bobby is proven to be innocent of any wrong doing.