Can Tomas Berdych and Ekaterina Makarova graduate from first-week firepowers to grand slam champions?
Taking the next step.
Four simple words probably on the minds of Tomas Berdych and Ekaterina Makarova tonight.
The pair have won through to the Australian Open quarter-finals in their respective draws.
And they share an all-too-similar fate - while they are masters of the first week, the second is their downfall.
Some would call them flat-track bullies - Berdych especially.
For all the talent the big-hitting Czech has, one appearance in a Wimbledon final is his best showing in the majors.
He has not dropped a set in the first four rounds at Melbourne Park in the past three years.
That said, Berdych has shown incremental improvement - with his three quarter-final losses in 2011, '12 and '13 followed by a semi-final appearance in '14.
Will '15 be any different?
Makarova is certainly hoping so.
She is coming off her first major semi-final at the US Open in September, and is on the verge of her third last-eight clash in Melbourne.
In her past 17 majors - the ongoing one included - she has reached the fourth round nine times. Wins beyond that, though, have been the hard part.
The left-hander has enough game and belief to win on Rod Laver Arena - she trounced Serena Williams there in 2012 - but '15 offers her a gilt-edged chance to progress against third seed Simona Halep.
Berdych's task to progress looms large - third seed Rafael Nadal is in his way - but he has significantly tested the Spaniard before, one noticeable time on centre court in Melbourne.
Nadal has beaten Berdych 17 times in a row, but the seventh seed's best chance to break that run was in January 2012 - when he had a point for a two-sets-to-love lead on the Mallorcan.
As on that fateful night, Berdych could not take the next step, claim that point in the tie-break and win.
But can he and Makarova alike take the opportunity before them, and rise beyond being first-week firepowers?