The drummer posted an open letter to Osbourne online earlier this week (beg13Apr15), demanding the frontman apologise for public remarks he had made about Ward.

The Paranoid singer responded via a Facebook post, which began, "Wow, Bill, what the f**k are you on about?"

Osbourne continued, "I cannot apologise for comments or opinions I may have made about you in the press during Sabbath's 13 album and tour - physically, you knew you were f**ked. (We) didn't think you could have done a two-hour set with a drum solo every night, so we made the decision to move on... Let's be honest. Deep down inside, you knew you weren't capable of doing the album and a 16-month tour... Bill, we go back a long way, let's stop this now before it gets out of hand."

However, Ward is not about to back down and he posted a lengthy rebuttal on his own Facebook page on Friday (17Apr15).

He writes, "I was ready and in shape to record. I knew I would need to get in better shape for the gigs - same as I have needed to do and have done in the past. I was beginning my workout regime to get 'tour ready'. I knew what I needed to do to play the gigs, and I was confident I would be ready. I would not commit to an extensive tour without believing I could go all the way with it. I wouldn’t do that to our fans.

"I didn’t expect you to respond to my request of an apology. By the way, it’s pretty easy to go back and really look at what was truth and what was not... Why did you stay in the studio working with me? Why did we go to England for band rehearsals in August 2011? Why did we continue rehearsing in the Fall...? Why did you call me in late January 2012 asking me to come over to England to continue rehearsals? Why, if you thought I was so unhealthy, did you continue with me at all? You know why, Oz, because I was fine. I was playing. I was good to go...

"I don’t believe a word of it. I am not an enemy. Eternity will show and serve as proof... I'm not going to own a f**king thing, other than I came into the studio initially overweight to tour, but not overweight to record. I was good to record. All of you know how much I put in, especially when I prepare to tour. Your own anticipatory fear has got you by the b**ls."

He adds, "I don't f**k with sincerity and honesty, period. I’ve done nothing but bring my truth to the fans. Man, you spin it real well. Sorry I can’t love you back, Oz. I put my love for you somewhere safe inside my heart in 2012 when your stories started showing up. It’s hard to love someone who thinks he’s telling the truth by making false claims, elitist comments and just plain rude statements.

"It’ll show up, Oz, in your dreams... All my actions have been of loyalty, honesty, and open-mindedness. Stay safe old friend. Sad we couldn't roll it out for the fans one more time."