Christian Horner believes there are many improvements for team to make

Aston Martin Red Bull Racing team principal Christian Horner believes that there are still areas for improvements in RB15. On the whole, it's been a strong season for Red Bull Racing so far, for large parts of it they were Mercedes biggest competitor until Ferrari found their form.

Max Verstappen was able to come through the field in Russia to secure a fourth-place finish and the Dutchman is enjoying a largely successful season to date.

 The team are looking for the lessons which have been learnt in this season as they move forward to Japan next weekend.

 " What we learn about understanding the car in 2019 can be taken to 2020, " Horner said.

 With five races remaining, Verstappen is fourth in the drivers' standings, three points behind Charles Leclerc of Ferrari