Serena Williams battled her way to the US Open quarter-final with a three-set victory over Maria Sakkari at Flushing Meadows.
After losing to Sakkari in three sets at the same stage of the Western & Southern Open just over a week ago, it was Williams who prevailed this time, taking it 6-3 6-7 6-3 in a match lasting two-and-a-half hours.
The 38-year-old six-time US Open champion next plays the winner of Alize Cornet and Tsvetana Pironkova as she moves one step closer to a 24th Grand Slam title, which would equal Margaret Court's long-standing record.
Williams lost her opening set 6-2 against 26th seed Sloane Stephens last time out and again looked in some trouble at 2-2 0-40, with Sakkari's exquisite movement proving troublesome early on.
The American found Championship form when she needed it, however, sealing an impressive hold to edge ahead, before breaking in the following game and seeing out the set 6-3.
Sakkari, who was bidding to become the first Greek woman to reach a Grand Slam quarter-final, made an assured start to the second set, however, taking the opening game to 15 with a stunning second serve ace down the "T".
Williams was then unable to muster a single break point in the second set and was made to save two set points to drag Sakkari into a tie-break.
Though bouncing back from 4-0 down and saving two further set points with a pair of outrageous winners, Sakkari finally levelled the match at 1-1 with what was her fifth opportunity.
With the scoreline mirroring their first two sets from the Southern & Western Open, Sakkari raced ahead in the deciding set once more, breaking Williams in the opening game of the decider.
And though breathing heavily from the latter stages of the second set, Williams found inspiration from within to break in the fourth, before setting up the chance to serve for the match with another break in the eighth.
Williams served out the game for her 100th win in the prestigious Arthur Ashe court to progress to the final eight.