Chris Wilder and Sheffield United have parted ways by mutual consent.
Sheffield are currently in last place in the Premier League.
"Being manager of Sheffield United has been a special journey and one I'll never forget.
"I was delighted to be given the opportunity in 2016 and have been delighted with the success we have achieved, including two promotions and a highest ever Premier League finish," said Wilder in a statement.
Tension between Wilder and club owner Abdullah Bin Musa'ad Bin Abdulaziz Al Saud had increased in recent weeks due to a lack of upgrades in the winter window.