\n<\/p>\n
For Sinner, it concludes a successful season that saw him claim his first two Grand Slam titles at January’s Australian Open and September’s US Open.<\/p>\n
The 23-year-old, who also won the season-ending ATP Finals earlier this month, has lost just six of his 76 ATP Tour matches in the last 12 months.<\/p>\n
Speaking in a news conference after their Davis Cup triumph, Berrettini described Sinner as “the most humble guy on the planet”.<\/p>\n
However, Sinner’s year has been disrupted by an ongoing doping controversy which has left his immediate future in the sport uncertain<\/a>.<\/p>\n “Of course it’s in the head a little bit,” Sinner said about the doping case.<\/p>\n “The most important part is all the people who know me as a human being trust me — that’s why I kept playing the level I have.<\/p>\n “I was emotionally a bit down, a bit heartbroken. Sometimes life gives you difficulties and you just have to [deal with] it.”<\/p>\n Sinner looked fatigued as he was forced to a tie-break in the opening set against Griekspoor, but surged late on in the second to seal Italy’s third Davis Cup triumph on his fourth match point.<\/p>\n Italy become the sixth team to win back-to-back Davis Cup titles since the final stage was introduced 52 years ago, and first since the Czech Republic in 2013.<\/p>\n<\/div>\n