Kyle Edmund will hope to show more evidence of a "killer instinct" when he takes on Italian Andreas Seppi at the Australian Open on Sunday.
The pair meet not before 05:00 GMT, with a first Grand Slam quarter-final place up for grabs for both men.
Seppi, 33, might feel that facing the world number 49 offers his best chance to date, but 23-year-old Edmund is a growing force in the Grand Slams.
Ranked 49th and yet to reach an ATP final, the British number two has some way to go, but his performances in Australia this year suggest an accelerated improvement.