It is often amazing how when one player moves there is suddenly a flurry of activity as a direct result. The domino effect.
There are plenty of teams in the Premier League, and scattered across Europe, that will play key roles in setting the dominos to fall, few as important as Romelu Lukaku returning to Inter Milan.
That loan is going to trigger a heap of movements from Manchester City and Leeds while Barcelona's summer business is hinging on the completion of Manchester United securing a deal for Frenkie de Jong.