VIDEO: How not to smash a ball by 12-time Grand Slam winner Novak Djokovic

Novak Djokovic made a good start to the Madrid Open, but he did produce one horror shot during his win over Kei Nishikori.

The 12-time Grand Slam winner kicked off his campaign in the Spanish capital with a solid 7-5, 6-3 win over the former US Open winner.

However, he produced a shot that he would want to forget in the second set while serving at 3-3 in the set.

Djokovic will face either Russian Daniil Medvedev or British No 1 Kyle Edmund in his next clash.