George Russell of Mercedes topped the first practice on Friday for the Formula One Mexican Grand Prix, in a session that was interrupted by two red flags. Russell clocked the fastest time of 1 minute 17.998 seconds, beating the Ferrari of Carlos Sainz by 0.317s. Yuki Tsunoda of Visa RB was third. Three-time world champion Max Verstappen left the session with concerns over his Red Bull car as he returned to the garage with five minutes left in the practice complaining about engine issues. The Dutchman was fourth, while team-mate and home favourite Sergio Perez was 10th. Verstappen is without vi…