Football clubs fear future transfer fees could take years to recover from the coronavirus pandemic.
Reduced match revenue, battles over income from TV rights, and uncertainty over when matches will resume look likely to suppress the market for players over the coming years.
Players values have already fallen amid the crisis, with global superstars like Kylian Mbappe, Harry Kane, Lionel Messi and Mohamed Salah all having had millions slashed off their estimated worth.
It could be a long time before the world record fees are beaten again. So what are the top transfers in football?
The top 20 are in the gallery above, in reverse order. To see the next big fee, swipe the picture.