Tost: Kvyat and Toro Rosso "lost trust" in each other

Franz Tost says Toro Rosso and Daniil Kvyat "lost trust" in each other during their previous partnership. Kvyat returns to the team next season following a year away from racing.

In the late summer, Kvyat announced he was returning to Toro Rosso for the third time. He initially signed for the team back in 2014, moved up to Red Bull and then back to Toro Rosso after just four races.

Tost believes the circumstances made it hard for Kvyat to perform once he returned back to Toro Rosso in 2016.

"He was very welcome because we rate him as a good driver, but in the end, it didn't work as well as we expected," Tost told Autosport.

"There were many crashes, the car was also not so competitive or easy to drive, and if you are then not so fixed and supported, then it's a difficult one.

"It was a very tough decision [to release Kvyat in 2017], but I think it was the best decision because I had the feeling that both parties lost a little bit the trust in each other."

The 24-year-old spent a season out of the cockpit. This year he has been working with Ferrari as a development driver. On his return to racing, Tost expects the Russian to take his chances.

"He deserves to be in F1, he is very fast, and I hope that this one-year sabbatical will help him to get everything together and to show his real talent and his abilities and his speed," added Tost.