Under the stewardship of Harry Redknapp names such as Glen Johnson, Jermain Defoe, Peter Crouch and Lassana Diarra arrived at Fratton Park for multi-million pound fees.
As a result, the Blues recorded their highest-ever Premier League finish while lifting the FA Cup in 2008.
But how much would they have spent and received on their influential players in today’s inflated market?
After The Athletic’s reports earlier this week we’ve dived into the stats and crunched the numbers using a transfer inflation calculator.
Here’s what we found out – and the results are staggering.
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1. Glen Johnson, - £10.64m
Signed: 2007-08 Transfer fee: £4m Picture: Anthony Devlin Photo: Anthony Devlin
2. Peter Crouch - £22m
Signed: 2008-09 Transfer fee: £9m Picture: Mike Egerton Photo: Mike Egerton
3. Gary O'Neil to Middlesbrough - £13.3m
Sold: 2007-08 Transfer fee: £5m Picture: Alex Livesey/Getty Images Photo: Alex Livesey
4. Niko Kranjcar - £13.125m
Signed: 2006-07 Transfer fee: £3.5m Picture: Adam Davy Photo: Adam Davy