The November international break has seen a host of managerial changes in the Premier League with Aston Villa, Newcastle and Norwich all appointing new managers.
Dean Smith has joined the Canaries - replacing the dismissed Daniel Farke - having been sacked as Villa boss, where he will be replaced by Steven Gerrard who returns to the division having won the Scottish top-flight with Rangers.
Eddie Howe has taken the reins at St. James's Park following last month's sacking of Steve Bruce, while Tottenham and Watford both recently appointed new bosses in Antonio Conte and Claudio Ranieri respectively.
There is much talk of a 'new manager bounce' whereby a coaching change sees a temporary - at least - upturn in results, although this is not always the case.
We have taken a look at the last 12 mid-season appointments and ranked them in terms of how they have gotten on.
Only permanent appointments are included in the list.
12) Jan Siewert, Huddersfield
Siewert led the Terriers to just one win in his seven months in charge and oversaw their relegation back to the Championship in 2019, having replaced David Wagner at the helm.
The German took over in January of that season after Wagner's exit, but his one victory at the helm was a 1-0 triumph over Wolves in his first game.
Huddersfield decided to keep Siewert over the summer following their relegation but his fate was sealed early in the 2019-20 Championship campaign with just one point from three league games.
11) Quique Sanchez Flores, Watford
Sanchez Flores's tenure at the Hornets was even shorter than Siewert at Huddersfield, winning just one of his 10 games at the helm.
He had replaced Javi Gracia in September of the 2019-20 campaign but his only victory at the helm was a triumph at Norwich City.
Sanchez Flores - who was in his second stint as Vicarage Road boss - was subsequently replaced by Nigel Pearson in December, speaking of whom…
10) Nigel Pearson, Watford
The Hornets took the surprising decision to sack Pearson with two games of the 2019/20 season remaining, with the side three points above the drop zone - with the club later relegated.
Pearson won seven matches in the Premier League - including beating runaway champions Liverpool 3-0 in a memorable performance - in a respectable points return that was significantly stronger than that of Gracia and Sanchez Flores before him.
After picking up 25 points in 20 league games under Pearson, Watford lost their final league games against Manchester City and Arsenal, condemning their fate.
9) Sam Allardyce, West Brom
Appointed in December 2019 to replace Slaven Bilic, Allardyce inherited a side who had just one win all season and faced an uphill battle to secure survival.
It took Allardyce six games to secure his first win - although it was a sweet one, with a 3-2 win at Black Country neighbours Wolves.
Yet that was one of just four wins for Allardyce's side - including a stunning 5-2 win at Chelsea - as they were condemned to relegation with the former England boss then stepping aside.
8) Jose Mourinho, Tottenham
Mourinho was sacked by Spurs just 17 months after replacing Mauricio Pochettino in November 2019 as he failed to secure an upturn in the club's fortunes.
The Portuguese began his Tottenham stint with back-to-back wins before old club Manchester United condemned him to his first defeat.
Spurs secured a stunning 6-1 win at Old Trafford early the following season and led the Premier League table by December, before the wheels fell off for the side.
Mourinho secured a sixth-placed finish in his first campaign before leaving the club in April 2021 with the club languishing in seventh.
7) Scott Parker, Fulham
The former England midfielder took over at Fulham in February 2019, and was unable to stop their impending relegation back to the Championship
Parker guided the West London club to promotion via the playoffs - achieved against local neighbours Brentford - the following year, before relegation again the following campaign.
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Fulham secured impressive away wins at Leicester, Everton and Liverpool but only had five Premier League wins all season, with 13 draws being their main stumbling block.
Parker's side picked up just two points from their final 10 league matches as their form fell away and they were, ultimately comfortably, relegated - with the former midfielder switching to Bournemouth this summer.
6) Mikel Arteta, Arsenal
Arteta was appointed as the news Gunners boss - after interim boss Freddie Ljungbjerg had succeeded Unai Emery - in December 2019.
An FA Cup success in his first campaign was hugely impressive, but the Gunners have endured stagnant league form in the time since.
Successive eighth-placed finishes in the Premier League were mediocre at best and while there were mitigating factors, it was falling flat of expectations at the club.
Improved results in recent months may yet see Arteta see Arsenal's patience in him vindicated but missing out on European football for the first time in 25 years was a significant failing.
5) Carlo Ancelotti, Everton
Ancelotti was very popular with Everton's fans after his appointment in December 2019, replacing Marco Silva at Goodison Park.
The Italian could only take Everton to 12 th and 10 th placed finishes in two mixed seasons, although there were notable successes in that time.
The Toffees secured their first win at Anfield in the Premier League in over two decades earlier this year while Richarlison and Dominic Calvert-Lewin formed a significant attacking partnership.
There was a sense there was a lot more to come from Ancelotti, but Real Madrid came calling in the summer as a utility appointment to succeed Zinedine Zidane.
4) Ole Gunnar Solskjaer, Man Utd
Solskjaer was appointed with Manchester United in disarray back in December 2018, languishing in sixth spot but as close to the relegation battle as the title race - and 11 points from the top four!
Mourinho had left a demoralised and bloated squad, but Solskjaer - initially appointed on an interim basis - winning 14 of his 19 games at the helm before his permanent appointment in early 2019.
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Solskjaer guided United to the Champions League quarter-finals with a stunning triumph over PSG, then took them to the semi-finals and final of the Europa League.
His two full seasons at Old Trafford saw impressive third and second placed finishes, but form has fallen away in recent months despite major investment.
United are in a much stronger place now than when the Norwegian was appointed, but doubts remain if he can take them to the next level.
3) Brendan Rodgers, Leicester
Having guided Celtic to all seven domestic trophies available during his tenure in Glasgow, Rodgers agreed to join Leicester in February 2019 to replace Claude Puel.
The Northern Irishman won the FA Cup and Community Shield with the Foxes this term after missing out on the top four in the Premier League on the final day of two successive campaigns.
Rodgers has been an undoubted success in the Midlands and remains one of the highest rated managers in the Premier League.
2) David Moyes, West Ham
No manager has enjoyed a transformation in fortunes and reputation quite as much in recent times as David Moyes.
After disastrous stints at Man United, Real Sociedad and Sunderland, he guided West Ham to survival in the 2017-18 campaign but his contract was not renewed.
He returned 18 months later in December 2019 on an 18-month contract and despite finishing just 16 th that season - securing survival underwhelmingly - results since have been sensational.
The Hammers finished sixth last season with a club record points total of 65 in 2020-21, and the club are flying high again this season - including being back in European football.
They have beaten Manchester United, Manchester City and Liverpool this season - and is firmly back in fashion.
1) Thomas Tuchel, Chelsea
Tuchel was appointed at Stamford Bridge in January this year after Frank Lampard left the side languishing in ninth place in the standings.
The league results were initially steady but not spectacular, with the club scrapping a top four finish despite a last-day defeat at Aston Villa, coupled with an FA Cup final loss to Leicester City.
Yet in Europe, the Blues were superb and Tuchel guided them to just their second ever Champions League title and now has Chelsea top of the pile in the early stages of the Premier League campaign.
His number one spot in this ranking really should be undisputed.