Fighting Ferrari has been massive challenge: Mercedes’ Lewis Hamilton

Three-time Formula 1 World Champion Lewis Hamilton said that fighting the Ferraris, who have been very competitive in 2017, has been a massive challenge. The Mercedes driver took the lead of the drivers' championship for the first time this year after winning the Italian Grand Prix in Monza on September 3. The next race will be held in Singapore on September 17. (Video courtesy: Perform)