Lewis Hamilton says Mercedes have some work to do overnight to try and ensure they beat Red Bull Racing to pole position for the United States Grand Prix. The Brit is currently six points behind title rival Max Verstappen in the Formula 1 World Championship.  Hamilton, who has won five Grands Prix at the Circuit of the Americas, came second in the first free practice session. The Brit beat his teammate the second time around, but Perez topped the timesheets for Red Bull. The Brit explains his thoughts on the sessions.  "Generally, it's been a good day. Still, work to do. That's the way it is. FP1 was a really good session, made some changes and I wasn't happy in FP2. We lost some...
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