Novak Djokovic calls for Olympic rule change after dismantling first-round opponent
![Novak Djokovic calls for Olympic rule change after dismantling first-round opponent](https://i2-prod.mirror.co.uk/incoming/article33340933.ece/ALTERNATES/s615/0_GettyImages-2163072854.jpg)
Novak Djokovic is representing Serbia in his fifth Olympic Games but has been left baffled by a rule which saw him tasked with beating an opponent who has not played singles in two years