Tearful Wimbledon runner-up Ons Jabeur on Saturday described her third defeat in a Grand Slam final as the "most painful" of her career but vowed to bounce back and break her jinx at the majors.

World number six Jabeur was beaten 6-4, 6-4 by unseeded Marketa Vondrousova of the Czech Republic, one year after she lost the Wimbledon final to Elena Rybakina.

More pain followed at the US Open later in the year where she was runner-up again, this time to Iga Swiatek.

The United Arab Emirates and India vowed on Saturday to make this year's COP28 conference in Dubai a success, as Indian Prime Minister Narendra Modi paid a visit to the Gulf state.

The oil-rich UAE will host the COP28 United Nations climate talks in November and December, as world nations remain far apart on means to reduce fossil fuels and reduce global warming.

Israeli Prime Minister Benjamin Netanyahu said Saturday he felt "very well" after being admitted to hospital for dizziness, with his office saying the politically and legally beleaguered 73-year-old had likely been dehydrated.

Netanyahu had been rushed to Sheba medical centre in the afternoon, his office said of Israel's largest hospital, located near Tel Aviv, noting he was in "good condition and undergoing medical evaluations".

Later his office said Netanyahu had on Friday spent time in the scorching heat of the Sea of Galilee, in Israel's north.

Marketa Vondrousova became the first unseeded woman to win Wimbledon in the Open era as the Czech swept to a shock 6-4, 6-4 victory over Tunisia's Ons Jabeur in Saturday's final.

As the first unseeded woman in the Wimbledon final in 60 years, Vondrousova was a heavy underdog against sixth-ranked Jabeur.

But the 24-year-old upset the odds on Centre Court to win her maiden Grand Slam title at the second attempt after losing to Ash Barty in the 2019 French Open final.

Sudanese army representatives have returned to Jeddah in Saudi Arabia for talks with their paramilitary foes, a government source said Saturday as the war between rival generals entered its fourth month.

"A delegation of the armed forces has returned to Jeddah to resume negotiations with Rapid Support Forces (RSF) rebels," the source told AFP on condition of anonymity because they were not authorised to speak to media.

At a sporting club in Tunis, young girls enthusiastically hit yellow tennis balls across the court in the hope of one day making it to Wimbledon, like their idol Ons Jabeur.

As the tennis star tried but failed for a third time to become the first African or Arab woman to win a Grand Slam singles title on Saturday, a tournament took place at the Tennis Club of Tunis in the Alain Savary neighbourhood, near the centre of the Tunisian capital.

Record heat is forecast around the world from the United States, where tens of millions are battling dangerously high temperatures, to Europe and Japan, in the latest example of the threat from global warming.

Italy faces weekend predictions of historic highs with the health ministry issuing a red alert for 16 cities including Rome, Bologna and Florence.

The meteo centre warned Italians to prepare for "the most intense heatwave of the summer and also one of the most intense of all time".

The United Nations is concerned about "unacceptable conditions" set by Damascus for allowing aid to flow through its Bab al-Hawa crossing to rebel-held areas in northwest Syria, according to a document reviewed Friday by AFP.

The delivery of humanitarian aid through the crossing has been stalled since Monday, when a 2014 UN deal expired.

Tunisian rights groups called on Friday for emergency aid and shelters for migrants expelled from Sfax last week, as dozens of people protested in Tunis in support of their plight.

Hundreds of migrants fled or were forced out of Tunisia's second-largest city after racial tensions flared following the July 3 killing of a Tunisian man in an altercation between locals and migrants.

With scorching temperatures and power cuts, Wissam Abed cools off from Baghdad's brutal summer by swimming in the Tigris river, but as Iraqi rivers dry up, so does the age-old pastime.

Near a bridge linking the east of the city to the west, Abed stood in the middle of the river, but the water only came up to his waist.

"I live here in Adhamiya, like my grandfather did before me. Year after year, the water situation gets worse," said the 37-year-old, referring to his neighbourhood nestled along the Tigris in northern Baghdad.