In accepting Valtteri Bottas' move to Mercedes, Williams admits it honored a pledge made to the Finn in 2015 when it blocked his transfer to Ferrari.
While other considerations were obviously taken into account, notably financial, when Williams negotiated its driver's release to its rival earlier this year, the promise was a preponderant argument in Bottas' favour, according to Claire Williams.
"Valtteri has been an important part of Williams, he's got that fiery passion that you want in a driver because all he wants to do is be in the best car and win," deputy team principal Williams told Autosport.
"When you have a driver that you know that's all they want, why force them to race your car? That's not the right thing to do."
Over the summer of 2015, Ferrari debated whether to keep Kimi Raikkonen in the Scuderia's stable. Among its potential options was the hiring from Williams of Valtteri Bottas, but the Grove-based outfit said no.
"We stood in Valtteri's way once, when Ferrari came along, and I made a promise to Valtteri I wouldn't stand in his way again - I honour my promises.
"He has an amazing opportunity, and it will be interesting to see how Valtteri does this year."
GALLERY: F1 drivers' wives and girlfriends
Keep up to date with all the F1 news via Facebook and Twitter
Sebastian Montoya, the 19-year-old son of former Formula 1 star Juan Pablo Montoya, is set…
When former Ferrari team principal Mattia Binotto took on the role of Chief Operating Officer…
Charles Leclerc concluded the 2024 F1 season with a sense of satisfaction, the Ferrari driver…
Former Formula 1 driver David Coulthard has voiced his dismay at FIA president Mohammed Ben…
Super Aguri's application to join Formula 1 became a reality on this day in 2005,…
Ferrari roared back into contention in 2024 to deliver their strongest season in years, thanks…