‘She’s done nothing wrong’: Djokovic urges fans not to turn on U.S. Open line judge

The Serb was disqualified in the fourth round after he hit a ball reasonably hard to the back of the court in frustration after dropping serve in the first set against Spain's Pablo Carreno Busta, sending the official to the floor.
                              The Serb was disqualified in the fourth round after he hit a ball reasonably hard to the back of the court in frustration after dropping serve in the first set against Spain's Pablo Carreno Busta, sending the official to the floor.

Source: ‘She’s done nothing wrong’: Djokovic urges fans not to turn on U.S. Open line judge