The Spaniard Rafael Nadal received an opening defeat at the ATP finals of the tennis experts in Turin.
The 36-year-old lost 6: 7 (3: 7), 1: 6 against Taylor Fritz on Sunday night.
The American transformed his first match ball after 1:37 hrs.
Naval won the Australian Open and also the French Open this year.
The record-Grand Slam competition winner had actually consistently had to bang around with injuries as well as, because of the birth of his first youngster, was able to gather barely any type of game practice.
In the very first game of the day, Casper Rued won 7: 6 (7: 4), 6: 4.
Due to the fact that of his foot injury, defending champ Alexander Zverev is missing at the end of the season of the eight finest tennis experts of the year.