Alexander Zverev says making the ATP Finals proves his progress this year as he aims to compete with Roger Federer and Rafa Nadal.
The Russian is now ranked number three in the world, behind only Federer and Nadal, as the rising star continues to develop.
The 20-year-old, who won two consecutive Masters 1000 titles this year when he came out on top in both the Italian Open and the Canadian Open, heads to the O2 for the first time for the ATP Finals, which start on Sunday, in good spirits.
Zverev, who is in Federer's group alongside Marin Cilic and Jack Sock, knows Nadal and the Swiss star will be hard to beat in London although he thinks he belongs in their company.
"Roger [Federer] and Rafa [Nadal] are favourites, especially on this surface, but I feel comfortable and confident," he said. "This is going to be my first time, hopefully not my last, but I’m going to try to prepare myself as best as I can and try to win many matches there.
"I think playing in that event is kind of like winning a tournament itself already. It shows you’ve been playing at a top-10 level the whole year."