Tennis aces inspire Spieth

Work ethic of Federer and Djokovic makes big impression

World No 1 Jordan Spieth says he wants to emulate the relentless drive of tennis icons Roger Federer and Novak Djokovic as he aims to cement his place at the pinnacle of world golf.

After a dominant 2015 which saw him seal back-to-back majors at the Masters and US Open, before a fourth-place finish at the British Open and a second at the PGA Championship, Spieth has already won his first tournament this year.