While Isak’s move was one between Premier League clubs, many of the major deals this summer have involved signings from Europe.
Liverpool, for example, brought in Florian Wirtz from Bayer Leverkusen for £116m, Hugo Ekitike from Eintracht Frankfurt for £79m, full-back Jeremie Frimpong from Bayer Leverkusen for £29.5m, keeper Giorgi Mamardashvili from Valencia for £29m and Giovanni Leoni from Parma for £26m.
In other headline deals, Arsenal spent a combined £114.5m on bringing in striker Viktor Gyokeres from Sporting and midfielder Martin Zubimendi from Real Sociedad, while Manchester United signed striker Benjamin Sesko from RB Leipzig for £73.7m.
Premier League clubs buying players from the European leagues will have contributed to the Bundesliga, La Liga and Ligue 1 finishing the window with a net profit of more than £400m between them.
“We are reaching a situation where the Premier League spending is so far ahead of the others and is so essential to the transfer market ecosystem, that the remaining ‘big five’ competitions are becoming feeder leagues,” said Paul MacDonald of FootballTransfers.com.
“La Liga, Serie A, Bundesliga and Ligue 1 all spent this summer, but it was money they had already generated from sales.
“Put simply there is the ‘Big One’ – the Premier League is such a behemoth it should no longer really be categorised with the other leagues in Europe.”