Barcelona paid a hefty transfer fee for Luis Suarez, Paris Saint-Germain spent big on David Luiz, Manchester City splashed the cash on Eliaquim Mangala, while Manchester United made Luke Shaw the most-expensive left-back - and teenager - in history.
Elsewhere, Real Madrid lured Toni Kroos and James Rodriguez to their squad to further increase the value of their team after the record-breaking buys of Cristiano Ronaldo and Gareth Bale in recent years.
Los Blancos' heavy spending in the past few seasons saw them field a starting XI which has cost them close to €500 million (£400m) in transfer fees in the European Super Cup win over Sevilla.
With Bale, Ronaldo and James, Madrid have three creative players for whom they paid a transfer fee of at least €80m (£64.2m), yet they have spent relatively little on their defensive options - an area that PSG have certainly not overlooked.
Here, Goal takes a look at the most expensive players in each position based on the transfer fees paid for them, with the total value of the most expensive current XI sitting at €668m (£536m).
Between the sticks, Juventus goalkeeper Gianluigi Buffon is the most expensive player following his €51m (£40.9m) move from Parma in the summer of 2001.
At right-back, Barcelona's Dani Alves makes an appearance, having joined his current team from Sevilla for a reputed fee of €35m (£28.1m) in 2008.
Paris Saint-Germain made David Luiz the most expensive defender in the world earlier this summer when they paid Chelsea €50m (£40.1m) for the Brazil international, only for Manchester City to spend even more on Eliaquim Mangala last week, with Porto receiving €30.5m (£24.5m) for 56.67 per cent of his rights, making for a total transfer fee of €53m (£42.5m).
England international Luke Shaw takes the left-back spot following his €37m (£30m) transfer from Southampton to Manchester United this summer.
The two holding midfielders in our 4-2-1-3 are Bayern Munich's Javi Martinez, who left Athletic Bilbao for €40m (£32.1m) in 2012, and Zenit St Petersburg's Belgium international, Axel Witsel, who cost the Russians the same fee.
Colombia international James Rodriguez earned himself an €80m move from Monaco to Real Madrid following his sublime performances at the World Cup to become the most-expensive attacking midfielder in the world.
Up front, a trio of Primera Division stars represent the attackers for whom the highest transfer fees were paid in the history of the game. Real Madrid splashed out €100m (£80m) to lure Gareth Bale away from Tottenham last summer, having previously paid €94m (£75m) for Cristiano Ronaldo from Manchester United. New Barcelona signing Luis Suarez completes the XI following his €88m (£70m) move from Liverpool earlier this summer.
Players who miss out in the most expensive XI despite commanding impressive fees themselves include Zlatan Ibrahimovic, Kaka, Edinson Cavani, Radamel Falcao, Fernando Torres, Neymar, Hulk, Sergio Aguero, Juan Mata and Thiago Silva.