To appreciate Nadal, watch what Murray endured at Wimbledon

To appreciate fully just how outstanding Rafael Nadal is at the moment 28 consecutive completed sets won in Grand Slam play

consider what Andy Murray went through at Wimbledon on Friday.

Murray’s title defense appeared to be on shaky ground in the third round, particularly through a stressful stretch at Centre Court against Fabio Fognini, the 28th-seeded Italian who won their most recent encounter and had five set points to force this one to a fifth.

No telling whether the No. 1-ranked Murray, or his vocal backers, could have handled that test. Didn’t need to find out, because Murray was steady enough to grab the last five games and beat Fognini 6-2, 4-6, 6-1, 7-5 as the sunlight faded.

“The end of the match was tense,” Murray said, in his typically understated way. “It was a very up-and-down match. I didn’t feel like it was the best tennis at times.”

The set he did drop was the first ceded so far this week by the Big 4: Roger Federer, Novak Djokovic, Nadal and Murray. That all-conquering quartet combined to win the past 14 Wimbledon championships — half by Federer, three by Djokovic, two apiece by Murray and Nadal. Ah, yes, Nadal. He is coming off a record 10th French Open title, claiming all 19 full sets he contested in Paris with as overpowering a performance as can be (one opponent quit because of injury in the middle of the second set). Tack on the nine collected at the All England Club, including a 6-1, 6-4, 7-6 (3) victory over 30th-seeded Karen Khachanov on Friday, and Nadal’s set streak in majors equals the thirdlongest of the Open era.

“I mean, if you don’t hit hard and fast, he’s going to destroy you,” the 21-year-old Khachanov said. “If he has time, he’s dominating with his forehand. And he can play all the angles.”

With his friend Sergio Garcia seated in the Royal Box, wearing the green jacket earned as Masters champion, Nadal put on quite a show.