LONDON — Jerzy Janowicz had just served up an ace to take a 4-1 lead in the third set against Andy Murray.
Tied at one set apiece in the Wimbledon semifinals, the big-serving Pole looked pretty much in control, annoying the second-seeded Briton with a combination of powerful ground strokes, slices and drop shots.
But all of a sudden, it all went wrong.
The 22-year-old Janowicz, who was bidding to become the youngest man to reach the final at the All England Club since Rafael Nadal five years ago, lost five consecutive games and, soon after, the match, 6-7 (2), 6-4, 6-4, 6-3.
"Such a shame I didn't play my best tennis today," said Janowicz, the first man from Poland to reach the semifinals of a Grand Slam tournament. "I was struggling a little bit with my serve. Everything basically collapsed after this one point when we were 30-all, third set, (4-2) for me."
On that point, Murray fired a forehand that hit the tape, crept over the net and bounced on Janowicz's side for a winner.
"He was lucky on this point," said Janowicz, seeded 24th. "That's it."
Janowicz then missed a drop shot and was punished by a crosscourt forehand winner as Murray broke back before seizing the momentum. Even the 30-minute interruption of play at the end of the third set to shut the Centre Court roof because of fading light could not help him recover.