AUS vs SA: David Warner sets internet on fire with MIND-BLOWING six against Dale Steyn at the WACA – WATCH

In the process of hitting Dale Steyn for a six over wide third man, David Warner lost his balance and his photograph of lying flat on the pitch was all over the social-media.

Perth: Australian opener David Warner was looking in brilliant form on Day 1 of the opening Test between the hosts and South Africa being played at Western Australia Cricket Association Ground. The left-hander, who is one of the most consistent batsmen in world cricket across formats, got his team off to a flier against the Saffers on Day 1.

After Mitchell Starc and Josh Hazlewood bowled South Africa out for just 242 runs in their first innings, Warner, along with Shaun Marsh stitched an unbeaten 105-run partnership for the opening wicket in just 21 overs.

VIDEO: David Warner out on 97 but Shane Warne blames commentator for the wicket

The diminutive left-hander tore apart the South African pace attack with a flurry of aggressive strokes. While Warner's 62-ball 73* was studded with 13 boundaries, one shot which was the highlight of the day was the one six he hit against Dale Steyn.

Steyn offered him some width and Warner was quick to pounce on it as he played an upper cut which sailed over wide third man for a six. In the process of doing so, the 30-year-old lost his balance and his photograph of lying flat on the pitch was all over the social-media.

Watch Warner's stunning six here:

At stumps on Day 1, Warner had cruised to 73 off just 62 balls and he was very well supported by Marsh, who remained unbeaten on 29.

Australia were trailing by just 137 runs with all ten wickets remaining.