Red Bull says it would be 'unfair' to make a decision about Daniil Kvyat's Formula 1 future at Toro Rosso while the Russian is going through a difficult phase.
Kvyat has struggled to rediscover his best form since swapping places with Max Verstappen at the Spanish Grand Prix.
He has faced problems extracting the best from the car, as well as a run of mechanical problems that have not allowed him to show his best.
At the Italian Grand Prix, he suffered a damaged floor after contact with other cars at the first corner before eventually being stopped by an overheating battery.
Kvyat's difficulties have come at the same time that Red Bull junior Pierre Gasly has hit winning form in GP2, as he currently leads the points' standings with just two rounds remaining.
The Frenchman's form has prompted speculation he could get promoted to Toro Rosso next year in favour of Kvyat, but Red Bull motorsport advisor Helmut Marko says that no decision will be taken for a while.
When asked how long it would be before Red Bull took a decision on who will be Carlos Sainz's teammate in 2017, Marko said: "When we have enough information and enough knowledge on Kvyat.
"At the moment he has so much bad luck, on technical, that it would not be fair to judge it at the moment."
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