Olympic champ Djokovic calls for more replay rulings after Auger-Aliassime's loss on 'embarrassing' call

Three men stand around a tennis net.

Tennis superstar Novak Djokovic is among those calling for instant replay to be used more effectively in the sport after Montreal's Felix Auger-Aliassime was eliminated from the Cincinnati Open due to a controversial call from a chair umpire on match point.