Nico Rosberg insists he is still in the running for the 2015 title and will not back down in his battle with Lewis Hamilton.
- Pirelli hopeful of more exciting Russian GP this year
- Keeping Button is important for motivation - McLaren
- Rosberg is not a quitter - Wolff
- 'Very difficult' to supply Toro Rosso - Honda
- Grosjean wants 'greatest high' for Lotus departure
- 'Frustrating' regulations delaying McLaren's fightback
- Ricciardo doubts Red Bull will quit F1