Ferrari's Carlos Sainz topped the opening practice session of the 2022 Mexico City Grand Prix, leading teammate Charles Leclerc in a session marked by red flags and high-altitude technical issues. Red Bull's Sergio Pérez and Max Verstappen tied for third place, with five rookies participating in the hour-long session. For full results, see F1i.com . 2022 Mexican Grand Prix Free Practice 1 - Results - F1i.com