Petra Kvitova's preparations for the defence of her Wimbledon title suffered a setback when she was beaten by Russia's Ekaterina Makarova in the first round of the Eastbourne International on Tuesday.
Madison Keys is the second-oldest woman to claim her first Australian Open singles title in the Open era.
Williams and Jabeur won their first two matches in the tournament and were scheduled to play in the semi-finals
She will first team up with Tunisian world number four Ons Jabeur for the doubles event at Eastbourne which gets underway this weekend.
Serena beat Sara Sorribes Tormo and Marie Bouzkova 2-6, 6-3, (13-11) in the women's doubles.
Defending champion Marion Bartoli was beaten 4-6, 7-5, 6-4 by unseeded Austrian Tamira Paszek in the semi-finals of the Eastbourne International on Friday. Bartoli, the fourth seed, paid tribute to her unheralded opponent who will play German fifth seed Angelique Kerber in Saturday's final at the Wimbledon warm-up event.
Unseeded Austrian Tamira Paszek saved five match points and overcame a leg injury to beat German fifth seed Angelique Kerber 5-7, 6-3, 7-5 and win the Eastbourne International tournament on Saturday.
Unseeded Italian Andreas Seppi won the first ATP title of his career in extraordinary circumstances on Saturday when Serbian opponent Janko Tipsarevic retired hurt in a rain-interrupted Eastbourne International final.
Daniela Hantuchova beat Venus Williams for the first time in 11 career meetings to advance to the semi-finals of the Eastbourne International grass court tournament on Thursday. The Slovak overcame difficult, windy conditions to triumph 6-2, 5-7, 6-2 and cut short Williams' comeback before she begins her bid for a sixth Wimbledon singles title next week.
Indian ace Somdev Devvarman stormed into the second round of the Eastbourne International men's singles, beating Guillermo Garcia-Lopez of Spain on Tuesday. The Asian Games gold medallist shocked the fourth seeded Spaniard 6-3, 6-4 to make up for the disappointment of losing in the first round at Queen's Club last week, where he lost to Australian qualifier Matthew Ebden.
Russian Dmitry Tursunov became the first men's champion at the Eastbourne International with a 6-3, 7-6 win over Canadian qualifier Frank Dancevic on Saturday but suffered an ankle injury that could dent his Wimbledon hopes.
Teenager Caroline Wozniacki warmed up for Wimbledon with victory in the Eastbourne International grasscourt tournament on Saturday.
Olympic champion Elena Dementieva began her warm-up for Wimbledon with a swift 6-2, 6-2 win over fellow Russian Maria Kirilenko at the Eastbourne International on Monday.
Top seed Svetlana Kuznetsova was beaten 6-2, 6-2 by Denmark's Caroline Wozniacki in the second round of the Eastbourne International on Wednesday.
World number one Justine Henin scored and easy win over Marion Bartoli while Amelie Mauresmo went through when her Russian semi-final opponent Nadia Petrova pulled out with injury.
Justine Henin began the defence of her Eastbourne International title in fine style on Wednesday, beating Poland's Agnieszka Radwanska 6-4, 6-1 and looking every inch a grasscourt player.
Polish teenager Agnieszka Radwanska won the biggest prize of her career when she beat Russian Nadia Petrova in a close-fought final at the Eastbourne International tournament on Saturday.
The Belgian world number one beat Amelie Mauresmo to keep the Eastbourne International title.
World number one Justine Henin brushed aside Czech teenager Nicole Vaidisova to reach the semi-finals of the Eastbourne International.
The defending champion will play eighth seed Marion Bartoli of France.
Sixth seeded Israeli Shahar Peer battled through a tough first match at the Eastbourne International on Tuesday against an injured but determined Elena Likhovtseva.
The 47-year-old nine-times champion said she is not trying to prove anything to anybody.
The second-seeded Russian beat Daniela Hantuchova 2-6, 7-6, 6-4 to win the Eastbourne International.
The Slovak will meet Svetlana Kuznetsova in the final of the Eastbourne International.
Karolina Pliskova warmed up for Wimbledon in the best possible fashion on Saturday by powering past Angelique Kerber 6-1, 6-4 to win the Eastbourne title.
Murray, who is attempting to return to the top of the tennis world after undergoing hip surgery in January, was out of sorts in the first set of the rain-delayed match, losing three service games behind some uncharacteristically soft second serves.
The British number one will play Croatian Donna Vekic, 7-6(5), 3-6, 7-6(4) victor over Czech Lucie Safarova in the day's second semi-final, in the climax to the Wimbledon warm-up tournament on Sunday.