When fans look back on the 2021 summer transfer window, it will be the big-name moves that will be remembered: Cristiano Ronaldo, Jack Grealish, Romelu Lukaku and Paris Saint-Germain's 'Greatest Ever Window' of superstar bargains, including Lionel Messi.
For the analysts, however, besides the performance of these stars, the sub-plots underpinning all of this activity in the 'endemic' Covid-19 world may be the more remarkable story.
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