The Italian spoke after his hard-fought victory against Wawrinka at the ATP Athens and confesses that "it is not easy to play with the ATP Finals qualification on his mind."
The Serbian confessed different aspects of his tennis life in a profound interview and stated that "being the number one in the world is the greatest achievement a tennis player can attain."
The Kazakh, who has won nine consecutive matches, is displaying her best tennis at the WTA Finals, which just a month ago seemed very far away.
