As far as grudge matches go, they don't come much more heated than West Ham's clash with Sheffield United.
Chris Wilder insists the Carlos Tevez saga of the 2006/07 season has long been forgotten at Bramall Lane.
Along with compatriot Javier Mascherano, the Argentine arrived at Upton Park in a deal that breached third party ownership rules.
To begin with, it was hardly an Ossie Ardiles and Ricky Villa moment.
But Tevez's goals - including a winner away to Manchester United on the final day of the campaign - kept the Hammers up and sent the Blades down on goal difference.
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The deal had breached third party ownership and Sheffield United felt they had gone down because of a player who shouldn't even have been allowed to feature.
An appeal to have their relegation overturned, and West Ham given a points deduction, were rejected.
West Ham eventually paid their counterparts £20million.
It might have been higher had Sheffield United - who then ended up in League One - not wanted to help already stricken West Ham avoid financial difficulties.
Regardless, it was Alan Curbishley's side who had the last laugh as they have spent all bar one season in the top flight ever since.
And their fans intend to revel in it when they meet for their first league meeting since the controversy at the London Stadium on Saturday.
West Ham fans are planning to don Tevez masks to wind up the travelling fans. Brutal, but hilarious.
Wilder believes the affair has been forgotten about.
"There's a lot of water gone under the bridge since and it's a long time ago. I've always got a big admiration for West Ham with the way they've gone about it in the past," he said, per the Mail.
"I think they are a very similar club to Sheffield United - a working-class club from the east end of London and the supporters want to see them play good football and work hard.
"In terms of what happened at the time, it was nothing to do with the players and nothing to do with the supporters. It was an administrative situation that got decided by the Premier League at the time.
"Off the back of that, with social media as well and going back and forth, there has been banter flying about, but we have played them once again already since in a cup game (in 2014) and this is a new group of players."
After all, Sheffield United don't look like scrapping for their lives this season, currently sitting seventh, on the back of a win over Arsenal, and with the joint-best defence in the league.News Now - Sport News