The #1 on the earth fell 6-2 7-6 in Novak Djokovic whereas Serbia received the inaugural occasion 2-1.
The Spaniard appeared aggravated when he chased the 5-2 within the first set, speaking to the referee of the match earlier than giving a sarcastic thumb to a loud part of the group.
"Truthfully, the group has been implausible each single day, however generally folks from some international locations most likely don't perceive how tennis goes," Nadal advised reporters after the loss.
"They suppose it's (like) soccer and issues and the ambiance in tennis is completely different. Respect for the gamers needs to be there and in some locations I believe respect from a small a part of the group (not) there." .
Spaniard Roberto Bautista Agut had defeated Dusan Lajovic in consecutive streaks earlier than Djokovic's singles victory leveled the draw.
Djokovic, alongside Viktor Troicki, triumphed within the brace in opposition to Feliciano Lopez and Pablo Carreno Busta to safe the title for Serbia.
The ATP Cup, which launched a second crew occasion within the tennis calendar on the high of the Davis Cup, noticed 24 international locations compete in three Australian cities – Brisbane, Perth and Sydney – for 10 days.
Final 12 months's Davis Cup, then again, began with qualifying rounds in February earlier than ending on November 30th when Spain defeated Canada.
However Nadal stated that extra work is required to forestall tournaments from being scheduled two months later.
"We’ve to discover a solution to make an settlement (between) ITF and ATP to create a giant competitors for the world cup, not two cups (inside two months)," stated Nadal.
"I believe it's complicated for the spectators and now we have to be clear in our sport."
The swing of the tournaments in Australia culminates within the Australian Open, which begins on January 20 in Melbourne.