Valtteri Bottas has thanked Mercedes team boss Toto Wolff for the "respect" shown throughout the decision-making process that ultimately led to him signing with Alfa Romeo.
Bottas will leave Mercedes at the end of the season to join Alfa Romeo on a multi-year deal, clearing the way for George Russell to partner Lewis Hamilton at the Silver Arrows.
After confirmation of his upcoming move, Bottas said: "Later this year, the time will come to say goodbye [to Mercedes] – that's not for now, but I would like to thank Toto and the team for the respect in how we took the decision together.
"I am really pleased to have chosen my new challenge with Alfa Romeo, an exciting and iconic manufacturer, and by the opportunity to help lead the team forward up the grid."
Bottas added that he is determined to look back on his time with Mercedes knowing that he has "left nothing on the table".
He has so far claimed nine Grand Prix victories with the team, while contributing to successive Constructors' titles since linking up with Hamilton in 2017.
"When I look back on my time with Mercedes, I want to be able to say that I squeezed every drop out of this opportunity and left nothing on the table; and I want to make sure that we finish our time together as champions," he said.
"It has been a privilege and a great sporting challenge to work with Lewis, and the harmony in our relationship played a big part in the Constructors' Championships we won as teammates."