Mercedes' championship leader Kimi Antonelli topped first practice at Formula 1's Austrian Grand Prix, having a slight edge on team-mate George Russell at a toasty Red Bull Ring.
Russell led the opening running in Spielberg on mediums with a 1m10.407s and then 1m09.898s, ahead of team-mate Antonelli. The Italian teenager took over command with a 1m08.448s lap, but a better comparison came at the halfway point when both Mercedes men donned Pirelli's softs. Antonelli set a 1m07.796s lap, 0.119s ahead of his team-mate, which would remain untouched until the end of the sweltering hot session in Styria.
