Novak Djokovic stayed on course as he entered the Wimbledon quarterfinals on Monday.
The source also said Khadem's relatives and parents, who are in Iran, had also received threats, without giving further details.
Victoria Azarenka rolled back the years at the Australian Open on Tuesday as the two-times champion crushed third seed Jessica Pegula to reach the semi-finals.
Sakshi had prevailed 3-2 in the regulation bout but the decision was challenged by the Kazakh team and eventually overturned; Mary Kom marches into final.
It was only Alcaraz's third tournament on grass, but the way he marched through the draw augurs well for his prospects at Wimbledon, where he will be seeded number one.
The 23-year-old Kazakh, whose previous best performance in a Grand Slam was reaching the quarter-final at the French Open last year, would like TO create history on the hallowed turf of the All England Lawn Tennis and Croquet Club.
In the evening session, Sumit faced Russia's Pavel Sosulin in his first bout and made a bright start. He used his powerful punches to good effect and took the first round by 3-2 before winning the second round by the same scoreline.
In the ongoing Women's World Boxing Championship, Preeti, Nitu Ghanghas and Manju Bamboriya clinched thumping wins on Saturday.
World champion Olga Dovogun recorded the magical score to win the women's 50m sport rifle prone gold at the Afro Asian Games.
Making a comeback after more than seven months, World No 3 Jyothi, who was sidelined in the Asian Games trial, is also in the hunt for an individual medal, having advanced into the semi-final.
Images from Day 3 of the 2023 French Open at Roland Garros in Paris on Tuesday.
Elena Rybakina knocked out defending champion Iga Swiatek at Indian Wells on Friday to set up a clash against Aryna Sabalenka in the final.
India's fortunes continued to tumbled at the London Olympics as boxer Jai Bhagwan went down to Gani Zhailauov of Kazakhstan in the men's lightweight 60-kg event at the ExCel South Arena 2, on Thursday. Zhailauov, bronze medallist at the World Championships last year, proved too superior for the Indian boxer, registering a convincing 16-8 victory.
Kazakhstan's Alexandre Vinokourov sprinted to victory in the men's cycling road race on Saturday, crushing British hopes of gold on the first full day of competition at the London Olympic Games.
Rybakina is the youngest Wimbledon women's singles champion since Petra Kvitova in 2011.
Indian Wells champions Carlos Alcaraz and Elena Rybakina stayed on course to complete the 'Sunshine Double' at the Miami Open.
Nitu has been in supreme form throughout the tournament, winning her first three bouts by RSC (referee stops contest).
Nikhat Zareen, Lovlina Borgohain, Nitu Ghanghas and Saweety Boora will look to bag gold at the Women's World Boxing Championship.
In the rematch of last year's quarter-finals, Nitu and Balkibekova went all guns blazing in the first round. However, the Kazakh was dominant and took the round 2-3.
Debutant Akash Kumar (54kg) signed off with a bronze medal in the AIBA men's World Boxing Championships after losing to Kazakhstan teenager Makhmud Sabyrkhan in the semi-finals, in Belgrade, on Thursday.
Mary Kom fought back in the final three minutes but that was not enough to get the judges' nod.
The Games will also include five competitors from China's western Xinjiang region, media there reported, including two ethnic Kazakhs, one Uyghur, one Kyrgyz and one from China's Han majority.
In the third round, Thapa attacked Usmonov relentlessly as the Tajak fell on the canvas within the first few seconds following which the referee gave him the count.
Ons Jabeur was so fixated on winning that she had even replaced her niece's photograph with an image of the Venus Rosewater Dish on the screensaver of her mobile phone.
Also ending with a bronze was tournament debutant and national champion Varinder Singh (60kg) after a high-intensity clash against Iran's Daniyal Shahbakhsh. The Indian lost 2-3 after fighting his heart out.
It is the first time that Modi and Xi came face-to-face since the Chinese People's Liberation Army occupied Indian territory in Ladakh in April 2020.
In Mumbai, ONGC Chairman R S Sharma confirmed Mittal's pullout. OVL had anticipated such a move and had a few months back sought Cabinet approval to invest all of the $400 million in the Satpayev on its own in case Mittal walked out.
Asked after the Wimbledon final about the War in Ukraine, Rybakina replied that her English was not good enough to speak about the issue.
Serbia had their backs to the wall when Kazakh veteran Mikhail Kukushkin beat debutant Miomir Kecmanovic in a three-hour epic in the first singles rubber. But Djokovic calmly levelled the tie with a straight-sets defeat of Alexander Bublik before returning to court to team up with Nikola Cacic and beat Kazakh pair Andrey Golubev and Aleksandr Nedovyesov 6-2, 2-6, 6-3.
Top seed Carlos Alcaraz snapped Daniil Medvedev's 19-match win streak with a 6-3, 6-2 rout in the Indian Wells final on Sunday.
IMAGES from Day 5 of the US Open, at the USTA Billie Jean King National Tennis Center, Flushing Meadows, New York, on Friday.
The gold rush continued for Indian shooters at the ISSF World Cup in New Delhi as Ganemat Sekhon and Angad Vir Singh Bajwa claimed the skeet mixed team top honours on the fifth competition day on Tuesday.
Grigor Dimitrov dispatched American 10th seed Frances Tiafoe in straight sets with a convincing 6-2 6-3 6-2 victory on Sunday.
Sources said ONGC Videsh Ltd, the overseas arm of state explorer, and GAIL have made a non-biding offer showing interest in acquiring Exxon's stake.
Herbert and Mahut added to their 2018 French Open title after recovering from a shaky start.
How sweet it is: Eubanks's climb up the ranks is 'icing on the cake'
Olympic-bound Indian boxers Shiva Thapa and Vikas Krishan started their build-up for the mega-event on a winning note. Both entered the second round of the third International Republic of Kazakhstan President's Cup in Almaty.
Wimbledon debutant Eubanks ends Tsitsipas's challenge in fourth round.