Professional streamer Herschel Beahm IV, better known as Dr. Disrespect, is certainly no stranger to controversy, or ticking off fellow gamers with his outlandish boasts. But the damage done by his latest tweet could have his fingers reaching for a pen and his checkbook — if one particular gamer has his way.

The latest controversy began earlier this week when Dr. Disrespect took a shot at mobile gaming by bragging about his supposed $200K computer setup at home.

So, what exactly did he say?

Taking aim at a past target — mobile gaming — the 38-year-old American bragged about his setup at home to belittle playing from a handheld device.

“I’ve got 3 state-of-the-art 1ms speed color calibrated monitors staring at me, a keyboard with titan switch optical keystrokes and a mouse that weighs literally nothing backed by a 200k multi pc setup,” he tweeted. “And you have the guts to tell me mobile gaming is a serious thing?”

It didn’t take long for him to get a response.

Little more than 12 hours after Doc’s tweet, popular Call of Duty: Mobile content creator Luke ‘iFerg’ Fergie of Ireland responded with a rather pricey challenge:

A 1v1 COD match for $100K (or half of the apparent value of Doc’s setup).

“You on your PC and I’ll play mobile,” iFerg tweeted to Doc.

Shortly afterward, Doc received enough taunts over the challenge that he had apparently had enough. Responding to repeated demands during a YouTube livestream that he accepts the challenge, Doc said, “Now you guys are starting to piss me off. I was in a good mood, I really was.”

Doc’s frustration did little to satisfy iFerg. In fact, the mobile gamer ramped up his taunts.

“What’s the problem Doc, Mobile players getting the better of you,” iFerg replied to a tweet showing Doc’s outburst during his livestream.

In a separate tweet, iFerg added, “No Aim Assist 1v1 btw,” explaining that the aim assist would not be available to the combatants should the contest actually go down.

Whether it actually does, however, remains to be seen. As of Saturday night, Doc had yet to officially respond to the challenge.

It also didn’t take long for other mobile gamers to take aim at Doc, one even offering up their own challenge.

Content creator Elijah “HawksNest” Jackson, like iFerg a member of Tribe Gaming, tweeted, “So what you’re telling me is you spent $200k+ to do something my $600 phone can do? Ha. Chump. Welcome to the future old man.”

He then offered up his challenge.

“Hey Doc, COD Mobile is on PC and cross platform, 1v1 me. 10k on the line. Anywhere, anytime. Seriously, anywhere, anytime. Unlike you, I really can do that with my system.”

Competitive PUBG Mobile player Kent “Juicy” Masang Jr. had no interest in a wager but was more direct — and colorful — in his criticism.

“Mobile gaming is just (too) difficult for your old crusty ass fingers to navigate step bro,” he tweeted. “All I hear is complaining for the old geezer himself. You remind me a lot of Jiraiya, the old pervy sage himself. Ya damn OLD MAN!”