The form and pace of Daniil Kvyat has caught the eye of Red Bull team boss Christian Horner, who believes that the youngster has been "sensational" this season.
The 20-year-old is in his debut campaign in Formula 1, having joined Toro Rosso after impressing in GP3 last year.
"He has been sensational and has been the rookie of the season so far," Horner told Autosport.
"His raw pace and speed, considering the jump he has made from GP3, is hugely impressive.
"He had little pre-season testing and Jean-Eric [Vergne] is a very quick driver, so the benchmark he's up against is good as well."
Formula 1 is currently in a four-week break and returns with the Belgian Grand Prix on August 24.
