Does the strength of a Premier League club's subs bench reflect their chances of top-flight success?
The game-changing trio have a combined value of just over £130million according to Transfermarkt, underlining the wealth of resources available to Pep Guardiola.
Title rivals Liverpool, meanwhile, introduced Mohamed Salah, Roberto Firmino and James Milner in their victory over Wolves, a trio Transfermarkt value at £126million.
Note: When more than one player has made the same number of appearances for the third position, an average of their values was taken.
Three most used substitutes: Jonathan Rowe (13 appearances, no market value), Lukas Rupp (12 apps, £1.63m), Adam Idah (11 apps, £2.7m), Christian Tzolis (11 apps, £8.1m)
Three most used substitutes: Matej Vydra (17 apps, £2.7m), Jay Rodriguez (16 apps, £2.7m), Ashley Barnes (15 apps, £1.8m)
Three most used substitutes: Yoane Wissa (18 apps, £9m), Shandon Baptiste (13 apps, £2.7m), Saman Ghoddos (13 apps, £2.7m)
Three most used substitutes: Tyler Roberts (16 apps, £7.2m), Joe Gelhardt (15 apps, £4.5m), Jamie Shackleton (7 apps, £2.7m), Mateusz Klich (7 apps, £8.6m), Pascal Struijk (7 apps, £13.5m)
Three most used substitutes: Cucho Hernandez (14 apps, £8.1m), Joao Pedro (13 apps, £9m), Ken Sema (11 apps, £2.7m)
That he still managed to be the Hornets' second-top scorer with five perhaps tells you why they will be playing Championship football next season.
Three most used substitutes: Jacob Murphy (20 apps, £3.6m), Miguel Almiron (11 apps, £14.4m), Sean Longstaff (9 apps, £11.7m), Ryan Fraser (9 apps, £10.35m)
Three most used substitutes: Ibrahimo Diallo (13 apps, £10.8m), Armando Broja (11 apps, £16.2m), Stuart Armstrong (10 apps, £5.4m), Shane Long (10 apps, £0.72m)
Three most used substitutes: Christian Benteke (14 apps, £6.3m), Michael Olise (14 apps, £19.8m),