Cesc Fabregas tops WhoScored's list of debuts from the weekend but you might also be surprised to see Patrick van Aanholt and Andrew Robertson in there...
We could have done practically a whole quiz on Chelsea's loanees but instead we've gone for the traditional one question per club...
1) Name the first £1,000 footballer, who moved from Sunderland to Middlesbrough in 1905.
2) Which Spanish player, who shares a name with a current Premier League striker, broke the world transfer record by moving from Barcelona to Inter in 1961?
3) Who moved from Fiorentina to Juventus for a world record fee just before the 1990 World Cup?
4) Diego Maradona broke the world transfer record twice in two years moving from club A to club B, then from club B to club C. Name clubs A, B & C.
Boca Juniors, Barcelona and Napoli
5) Real Madrid have broken the world transfer record four times since 2000 - name all four players in question.
Luis Figo, Zinedine Zidane, Kaka and Cristiano Ronaldo
6) Which Italian side were the last club not called Real Madrid to hold the world transfer record, when they bought Hernan Crespo?
7) Who was the last English player to break the world transfer record?
8) Name the player who set the world transfer record by moving from Torino to AC Milan in 1992.
9) Which club did Real Betis pay £18.5million for Denilson in 1998?
10) Denis Law was the first British player to be sold for £100,000, in 1961. Who bought him?
11) Name the three players Manchester United have broken the British transfer record for since 1995.
Andy Cole, Juan Sebastian Veron and Rio Ferdinand
12) Nottingham Forest have been involved in British record transfers twice - one buying, one selling. Name the players involved.
Trevor Francis and Stan Collymore
13) Manchester United paid £1.5million then received £1.5million for two midfielders in 1981 and 1984, setting and equalling the British transfer record. Name those two midfielders.
Bryan Robson and Ray Wilkins
14) Who is the only defender in the last 40 years to hold the British transfer record?
15) Who is the only Scottish club to break the world transfer record?
Falkirk, who paid West Ham £5,000 for Syd Puddlefoot in 1922
16) When Trevor Francis became the England's first £1million player, an Italian striker had already moved for £1.75million - name that striker.
17) Between which two clubs did Ruud Gullit move to set the world transfer record in 1987?
PSV Eindhoven and AC Milan
18) Who did Bari pay £5.5million for to break the British transfer record in 1991?
19) Teams from which country have broken the world transfer record the most?
Italy, with 18
20) Name the eight players who broke the world transfer record in the 1990s.
Roberto Baggio, Jean-Pierre Papin, Gianluca Vialli, Gianluigi Lentini, Alan Shearer, Ronaldo, Denilson and Christian Vieri