Alex McLeish has left his role as Nottingham Forest manager by mutual consent, after only six weeks in the role.
Recent reports speculated that McLeish was considering his future at the City Ground.
The Scot was left frustrated after missing out on several transfer targets last month - most notably Peterborough winger George Boyd whose move to the east midlands was scuppered by a failed eye test.
And a bad week for McLeish was capped on Saturday with a 2-1 defeat at his former club Birmingham, where both Blues goals were scored by another player he tried to sign - Chris Burke.
It is thought the reason behind McLeish's decision to leave Forest is interference from the club's Kuwaiti owners, the Al-Hasawi family, in team affairs.
McLeish, who replaced Sean O'Driscoll as manager on December 27, said via a statement on the club's official website, nottinghamforest.co.uk: "I am extremely saddened to be leaving after such a short period.
"But even so, it has been a privilege to be manager of such a fantastic football club and I want to thank the players, staff and fans for their support and wish Nottingham Forest the best of fortunes ahead.
"Both parties entered into the relationship in good faith. However, there was a difference in the understanding of the development strategy of the football club and it was felt by both parties that we should part company."