By Sonia Oxley
Lisicki, awarded a wildcard to the main draw following an ankle injury which put her on crutches last year, burst into tears as she dropped to her knees in celebration after booking a third-round clash with Japan's Misaki Doi, the world number 133.
"They (the crowd) really helped me when I was two match points down. I didn't know it could get so loud in there. It was amazing."
The match was played under Center Court's retractable roof with rain splashing on the top when the players were warming up but it did not stop Li sporting a sun visor.
What had seemed to be a filler-in between two men's matches on the showpiece court, judging by the number of empty seats at the start as fans sought refreshments, turned into a thriller.
"(From the } start of the first point till the end of the match, every serve was like around 117 miles. I mean, this is impossible for the women," Li told a news conference.
Neither player seemed to want to make it easy for themselves as Lisicki dropped serve when serving for the set in the ninth game but she broke back immediately to level the match.
The fast serves kept raining down, with Li powerless to stop herself over hitting her returns even if her sizzling crosscourt backhands kept her very much in the match.
The finishing line was in sight when she earned herself two match points on the Lisicki serve but she twice sent shots into the net and her chance slipped away.
Buoyed by her narrow escape and a wave of support for the underdog, Lisicki kept her nerve to set up her own match points and she sealed an emotional victory on her third when Li sent a forehand wide.
(Editing by Ed Osmond)