One of the main storylines of this summer's transfer window was would happen with the future of Belgian goalkeeper Thibaut Courtois and what Chelsea would do at the goalkeeper position.
Los Blancos have already allowed Mateo Kovacic to join Chelsea on a season-long loan, and compatriot Modric is also itching to leave having already agreed terms with Inter.
After being strongly linked to Real Madrid, Arrizabalaga signed a new deal with Bilbao in January that raised his release fee to €80 million from €20 million.
The Spaniard's move came just weeks after Liverpool broke the record in a 72.5-million-euro move for Brazilian worldwide Alisson Becker from Roma.
He's only 23-years-old, thus could fill the void between the posts at Stamford Bridge for the coming decade.
Kepa played 30 times in La Liga for Bilbao last season and kept seven clean sheets as the Basque side finished 16th in the table.
The reward for his patience came when Chelsea made a decision to meet Athletic's demands after agreeing to let Courtois join Real.
As for transfers, there was not a sniff of a new signing until Jorginho arrived in mid-July.
"I still have one year to go with Chelsea plus maybe another one", Giroud added.
"The team would never be successful without the help of all the other members who are devoted to the players and the club, such as the medical department, kit men and all the others who I can't thank separately". Chelsea has made a great bet in taking me. Today, Kepa Arrizabalaga completes his move to Chelsea....
That task looked set to be more hard after he starred for Belgium at the World Cup but, not the type to court controversy, Hazard has not tried to force his club's hand despite making it clear he would welcome the chance to represent Real Madrid.
"It was a very short break but I was aware before the World Cup that I was only going to have three weeks off", he continued. I just need to prepare well and be ready as soon as possible for the team.