Mercedes driver Valtteri Bottas of Finland competes during the first practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Ferrari driver Kimi Raikkonen of Finland is seen during the first practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Red Bull Racing Tag Heuer Belgian-Dutch driver Max Verstappen competes during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Ferrari driver Kimi Raikkonen of Finland is seen during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Mercedes driver Lewis Hamilton of Britain competes during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Mercedes driver Lewis Hamilton of Britain is seen during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Red Bull Racing Tag Heuer Belgian-Dutch driver Max Verstappen competes during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Ferrari driver Kimi Raikkonen of Finland is seen during the first practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Mercedes driver Lewis Hamilton of Britain competes during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Mercedes driver Valtteri Bottas of Finland competes during the first practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Ferrari driver Kimi Raikkonen of Finland competes during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Mercedes driver Valtteri Bottas of Finland competes during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Pit crew work for Red Bull Racing Tag Heuer driver Daniel Ricciardo of Australia during the first practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Ferrari driver Sebastian Vettel of Germany is seen during the first practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Mercedes driver Valtteri Bottas of Finland is seen during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
Red Bull Racing Tag Heuer Belgian-Dutch driver Max Verstappen is seen during the second practice session of the Formula One Monaco Grand Prix in Monaco, on May 25, 2017. (Xinhua/Michael Alesi)
