It's one of the byproducts of the COVID-induced cash crunch in football, and it has created an unprecedented situation across Europe. At no point in recent history have so many key players at big clubs found themselves in the final year of their contract, as is the case heading into the 2021-22 season.
You want forwards? How about Paulo Dybala, Alexandre Lacazette or Kylian Mbappe? And you can probably add Erling Haaland to that list: he's not in the last year of his deal, but given his release clause that kicks in after next season -- thought to be around €70m -- is so much less than his market value, he may as well be.