Clearly, the 30-year-old was going to be hard pressed to survive another long and strenuous match. Tsitsipas knew full well that he might have an edge in a drawn-out battle because he was fresher. Despite four consecutive victories all carved out in four sets, he was in relatively good shape. Moreover, he is 10 years younger. But the fact remained that both men were extraordinarily driven to be the victor in this showdown. In only the seventh major tournament of his young career, Tsitsipas was appearing in his first quarterfinal. Bautista was playing the 25th major of his career. Nine times he had gone to the round of 16, but never beyond. These were circumstances that motivated both men immensely.
Remarkably, Tsitsipas lost his serve in the opening game of the match when he missed an overhead on break point. He had not been broken once by the mighty Federer. Bautista built a 4-2 lead after holding at love in the sixth game. But Tsitsipas, so listless until this stage, suddenly found another gear in his game. He held on in the seventh game and then broke Bautista Agut, displaying excellent feel on a lob that got him back into the point. Surprised by that play, Bautista Agut uncharacteristically missed an easy forehand that was born of indecision.
Back to 4-4, Tsitisipas won a deuce game on his serve for 5-4, employing his excellent wide slice serve in the deuce court to open up an avenue for a forehand winner. Bautista battled back gamely to 5-5, but Tsitsipas served two aces in a love hold for 6-5. With the wily Spaniard serving to stay in the set, he saved one set point but, at 30-40, Tsitisipas approached on a forehand down the line to elicit an errant backhand pass.
Set to Tsitsipas, 7-5. From 2-4 down, he had won five of six games, no longer allowing Bautista Agut to dictate, showing off his own versatility in the process. Bautista Agut seemed somewhat fatigued already, and he was surely deflated that a set that was within his grasp slipped away elusively. But he was resurgent in the second set, breaking serve for 2-1, anticipating a backhand drop shot from Tsitsipas and easily hitting a winner in response. All through that set, Bautista Agut located his serve precisely and backed it up with a barrage of forehands that kept Tsitisipas on his heels and out of sorts. In five service games, he dropped only four points. The Spaniard secured the set, 6-4.
Back to one set all, Bautista Agut seemed revitalized. In the fifth game he got the first break of the third set, blasting away unrelentingly off the forehand, finishing off that point with an inside out winner off that sterling side. He held at 15 for 4-2. Tsitsipas was much too passive in this stretch, and was getting outhit predominantly from the baseline. Moreover, he was wilting in the heat. Serving in the seventh game of that third set, trailing 2-4, 30-30, Tsitsipas was unmistakably fatigued. But an excellent wide serve in the deuce court followed by a body serve to the backhand in the ad court provoked return errors from Bautista Agut.
That was a crucial hold for the Greek competitor. Now he put on his strategic cap. With Bautista Agut serving at break point down in the eighth game, Tsitsipas went with a short angled backhand slice, drawing Bautista Agut in. Tsitsipas passed him cleanly off the forehand to reach 4-4. After Tsitsipas held on in the ninth game, Tsitsipas would not let go as Bautista Agut served to stay in the set. There were three deuces, but ultimately Tsitsipas was unstoppable, gaining the break by chasing down an inside out forehand drop shot from Bautista Agut and clipping the line with a backhand winner up the line.