Nishikori firmly focused on first Slam title

Japanese star aiming for big net gains following best season of his career

Kei Nishikori believes his strong showing at the ATP Tour Finals will provide the perfect springboard to win his first Grand Slam crown next year.

Nishikori enjoyed a breakthrough campaign in 2014 as the Japanese star reached his maiden Grand Slam final at the US Open and became the first Asian singles player to qualify for the prestigious season-ending Tour Finals after climbing to fifth in the world rankings.