Alisson wasn't the world's most expensive goalkeeper for long. Three weeks after the Brazilian joined Kepa Arrizabalaga.
Arriving from Athletic Bilbao for an eye-popping £71million, Kepa was seen as the ideal replacement for Thibaut Courtois, who had finally sealed his dream move to Real Madrid.
The young Spain international, who went to the World Cup in Russia as David de Gea's understudy, replaced the Belgian, signing a seven-year contract.
The hope was that Kepa would immediately fill the sizeable void created in the wake of Courtois' departure. The Belgian had established himself as one of Europe's top stoppers over four seasons at Stamford Bridge and succeeding him between the sticks at Stamford Bridge would be no mean feat.
But Kepa – who only turned 24 in October – has risen to the challenge admirably. Now – with almost a third of the Premier League season over and done with – seems an appropriate time to assess his short time at the Blues.
With just eight goals conceded in a dozen games, on the surface it would appear that Kepa has adapted to English football quickly.
In the latest episode of Three Minute Myths, embedded above, we delve into the statistics from the Football Whispers Lab to compare Kepa with Courtois as the world's most expensive goalkeeper continues to settle into his relatively new surroundings.