With Flipkens, seeded 20th, coming away a 4-6, 6-3, 6-4 win over eighth-seeded Petra Kvitova, who won at Wimbledon in 2011, women's tennis is assured a new Grand Slam champion, as none of the semifinalists has won a major tournament title.
Lisicki, seeded 23rd, was the first through the quarterfinals Tuesday, defeating Kaia Kanepi 6-3, 6-3. Radwanska, the No. 4 seed, edged sixth-seeded Li Na in a match that took nearly 3 hours and Bartoli, the No. 15 seed, got by 17th-seeded Sloane Stephens 6-4, 7-5.
Radwanska and Lisicki, who have split their two previous meetings, will meet in one of Thursday's semifinals. Bartoli and Flipkens have never played each other.
Flipkens committed just five unforced errors in beating Kvitova. Kvitova converted both of her break chances to take the first set but managed just one other such opportunity the rest of the way. Flipkens won about three-quarters of the points in serve over the last two sets.
Radwanska played the later stages of her match with her right leg heavily taped but was able to fight off four third-set break chances by Li. Radwanska finished off two of her own nine opportunities in the set and gained her second straight Wimbledon semifinals appearance.
She lost in last year's tournament final to Serena Williams.
Lisicki followed up her Monday upset of Williams, the world No. 1, with an efficient 65-minute victory over Kanepi. She was able to cash in four of her five break chances in earning her second Grand Slam semifinal.
The other was two years ago also at Wimbledon.
Bartoli took the first set from Stephens with a break in the 10th game. After Bartoli held serve to open the second set, the players each broke the other four times. Stephens finally held serve to get to 5-5 but Bartoli also held and then collected her sixth break of the day to close the match.