Mikel Arteta started with a Pablo Mari while Jurgen Klopp made a whole host of signings for Mainz. Thomas Tuchel has the biggest signing.
First Arsenal signing: Pablo Mari (from Flamengo, 2020)
Most expensive career signing: Thomas Partey (Atletico Madrid to Arsenal for £45m, 2020)
First career signing: Arsenal loaned Pablo Mari in January 2020, signed him permanently for £6.8m that June and loaned him to Udinese this winter, with a view to selling him for whatever they can squeeze out of suitors in the summer. He will probably end on 19 appearances for the Gunners.
First Aston Villa signing: Philippe Coutinho (from Barcelona, 2022)
Most expensive career signing: Lucas Digne (Everton to Aston Villa for £25m, 2022)
First career signing: Making Scott Arfield and Allan McGregor the first signings of your career within two May days of each other, not even a fortnight after your Rangers appointment was made official, is proper.
First Bournemouth signing: Emiliano Marcondes (from Brentford, 2021)
Most expensive career signing: Ivan Cavaleiro (Wolves to Fulham for £15m, 2020)
First career signing: Before Fulham handed £15m over to Wolves for Championship stalwart Ivan Cavaleiro, Parker tried the winger on loan. Six months was enough to convince them. He has scored six goals and claimed one assist in 72 league games since joining permanently.
First Brentford signing: Bryan Mbeumo (from Troyes, 2019)
Most expensive career signing: Kristoffer Ajer (Celtic to Brentford for £13.5m, 2021)
First career signing: Good eye for a keeper, that Thomas Frank fella. Lukas Hradecky joined Brondby as a free agent in 2013. Five years later he was in the Bundesliga team of the season and he is Bayer Leverkusen’s current No. 1.
First Brighton signing: Matt Clarke (from Portsmouth, 2019)
Most expensive career signing: Enock Mwepu (Red Bull Salzburg to Brighton for £20m, 2021)
First career signing: Back in 2011, the first signing made by Potter at Ostersunds was of Georgian goalkeeper Besarion Kodalaev, a player so obscure that he has a silhouette as his picture on Transfermarkt. He never played for Ostersunds but is still kicking around lower-league Swedish football, keeping a clean sheet last week for third-tier FC Trollhättan.
First Chelsea signing: Marcus Bettinelli (from Fulham, 2021)
Most expensive career signing: Kylian Mbappe (Monaco to PSG for £165.7m, 2017)
First career signing: The final day of 2019 saw Tuchel splash out around £150,000 for a pair of midfielders – the Czech Jan Simak and the American Jared Jeffrey. Neither made much of an impression on the club or on the career of Tuchel.
First Crystal Palace signing: Michael Olise (from Reading, 2021)
Most expensive career signing: Kasper Dolberg (Ajax to Nice for £18.5m, 2019)
First career signing: ‘Signing’ is an odd way to put it but NYCFC traded some money and Brandon Vincent (now retired) for Jack Harrison with Chicago Fire. Two years later he was ‘sold’ to Manchester City and has since made them a tasty profit by joining Leeds United.
First Everton signing: Donny van de Beek (from Manchester United, 2022)
Most expensive career signing: Kai Havertz (Bayer Leverkusen to Chelsea for £71m, 2020)
First career signing: Pretty much the first thing Lampard did as Derby manager in the summer of 2018 was to go and ask Chelsea if he could borrow their rather promising young midfielder Mason Mount. It was a sensible move that ultimately earned Lampard the actual Chelsea job.
First Fulham signing: Harry Wilson (from Liverpool, 2021)
Most expensive career signing: Richarlison (Watford to Everton for £35m, 2018)
First career signing: Portuguese striker Diogo Tavares played for 17 clubs in his career but one of them was not Estoril Praia, where Marco Silva signed him and them immediately loaned him to Santa Clara before he left the following year for Ancona on a free transfer.
First Leeds signing: Brenden Aaronson (from Red Bull Salzburg, 2022)
Most expensive career signing: Brenden Aaronson (Red Bull Salzburg to Leeds for £22.2m, 2022)
First career signing: Montreal Impact signed Nelson Rivas after he was released by Inter Milan. No impact was made.
First Leicester signing: James Justin (from Luton, 2019)
Most expensive career signing: Youri Tielemans (Monaco to Leicester for £40m, 2019)
First career signing: All great managerial careers begin with a loan move for Liam Bridcutt but he was soon sent back to Chelsea after he consistently struggled to get near the Watford first team. He never played for Chelsea but did reach the Premier League with Sunderland. Now at Lincoln City in League One.
First Liverpool signing: Marko Grujic (from Red Star Belgrade, 2016)
Most expensive career signing: Virgil van Dijk (Southampton to Liverpool for £75m, 2018)
First career signing: It’s hard to know exactly so take your pick from Dennis Weiland, his brother Niclas Weiland, Sven Christ, Christopher Ihm and Mohammed Muftawu, all signed for nothing in the summer of 2011.
First Manchester City signing: Ilkay Gundogan (from Borussia Dortmund, 2016)
Most expensive career signing: Jack Grealish (Aston Villa to Manchester City for £100m, 2021)
First career signing: Not the most glamorous of Barcelona signings but Seydou Keita was a valuable squad member for Guardiola and won a barrel-load of trophies after his £12m move from Seville.
Erik ten Hag
First Manchester United signing: N/A
Most expensive career signing: Sebastien Haller (West Ham to Ajax for £20.25m, 2021)
First career signing: It’s hard to pin-point who was first in the door at Go Ahead Eagles in the summer of 2012 but we do know that Sjoerd Overgoor was brilliant in that promotion-winning midfield after joining on a free transfer from De Graafschap.
First Newcastle signing: Kieran Trippier (from Atletico Madrid, 2022)
Most expensive career signing: Bruno Guimaraes (Lyon to Newcastle for £35m, 2022)
First career signing: One of the first things he did when becoming Bournemouth manager was to bring in Jake Thomson on loan from Southampton and Rhoys Wiggins on loan from Crystal Palace. Smart moves.
First Nottingham Forest signing: Keinan Davis (from Aston Villa, 2022)
Most expensive career signing: Jamal Lowe (Wigan to Swansea for £800,000, 2020)
First career signing: It was inevitable that Cooper’s first signing at Swansea was a veteran of the England youth scene in Jake Bidwell, signed on a free transfer from QPR. He twice helped the Swans reach the play-offs before leaving on a free transfer to Coventry City.
First Southampton signing: Moussa Djenepo (from Standard Liege, 2019)
Most expensive career signing: Naby Keita (RB Salzburg to RB Leipzig for £24m, 2016)
First career signing: Now here’s a familiar name. Tobias (brother of) Schweinsteiger arrived at Unterhaching on a free transfer from VfB Lübeck. Does anybody else forget there are journeymen in other countries too?
First Tottenham signing: Rodrigo Bentancur (from Juventus, 2022)
Most expensive career signing: Romelu Lukaku (Manchester United to Inter Milan for £75m, 2019)
First career signing: Again, it’s hard to say exactly who came through the door first at Alezzo in the summer of 2006 but we are plumping for right-back Francesco Galeoto on a free transfer from Treviso.
First West Ham signing: Joao Mario (from Inter Milan, 2018)
Most expensive career signing: Juan Mata (Chelsea to Man Utd for £37.1m, 2014)
First career signing: That’s more like it. While at Preston, Moyes signed John Mullin on loan from Sunderland. He did not earn himself a permanent deal.
First Wolves signing: Yerson Mosquera (from Atletico Nacional, 2021)
Most expensive career signing: Julian Weigl (Borussia Dortmund to Benfica for £17m, 2020)
First career signing: Brazilian Caio Lucas arrived at Benfica on a free transfer from Al-Ain FC but lasted only a few months before heading back to the Middle East to sign for Sharjah FC, where he is tearing up the UAE league.