The Ohio State-Michigan rivalry is in full force this offseason. And according to multiple reports, there is no love lost between head coaches Ryan Day and Jim Harbaugh.

According to a report from Bucknuts, Day was speaking during a B1G coaches conference call earlier this week and was interrupted by Harbaugh, who accused the Buckeyes of breaking rules for providing impermissible on-field instruction before it was allowed. That accusation didn’t sit well with the Ohio State head coach.

“How about I worry about my team and you worry about yours?” Day reportedly said to Harbaugh. But Day’s frustration with Harbaugh didn’t end on the conference call, and reportedly spilled over into the football facility.

During a team meeting after the call, Day reported told his players “Michigan better hope for a mercy rule this year because we are going to hang 100 on them.” Day’s comments were confirmed by ESPN¬†on Thursday.

On Thursday, after Ohio State finished its first day of fall camp, Day was asked about the interaction with Harbaugh.

“I appreciate the question,” Day said, “but I’d rather not answer that right now.”

When Ohio State’s team captains met with reporters earlier this week to talk about the upcoming season, both QB Justin Fields and OL Wyatt Davis said they planned to “beat the brakes” off of Michigan this year.

This year, fans won’t have to wait nearly as long to see the annual Ohio State-Michigan game. With the B1G’s revised schedule, the two rivals will meet in Columbus on Oct. 24.

Ohio State has won eight straight games in the series. Day is 1-0 against Harbaugh.