Daniil Kvyat says news of his demotion from Red Bull to Toro Rosso came as a "shock" as he prepares for his first weekend back with the Italian operation.
Kvyat raced for Toro Rosso in 2014 but was moved up to Red Bull in 2015 amid Sebastian Vettel's departure to Ferrari.
However, Red Bull has now promoted Max Verstappen at the expense of Kvyat, who will return to Toro Rosso for the remainder of 2016.
"I think obviously the decision in a way was a bit of a shock for myself, it is what it is at the moment, I always have been giving my answers on the track and nothing will change," he said.
"There are 17 races remaining, I come back to Toro Rosso, the team which I raced with in 2014, the team which I really like a lot, I felt the last few days the team has given me a warm welcome."
Kvyat denied suggestions that his move to Red Bull, after just a single season with Toro Rosso, came too soon.
"I don’t think so, like I said, if we look at what happened three weeks ago I was standing on the podium, a few decisions were made, the bosses made them and I can accept them," he said.
"I’ve done everything correctly up to now and nothing will change on my side."