Rafael Nadal will make his return to ATP competition for the first time since January when he plays Flavio Cobolli in the Barcelona Open next week.
The Spanish star took a medical timeout, had the ankle taped and won the first game but after dropping his serve in the second game he called it quits, in another setback to a so-far disappointing 2024 campaign.
"Everywhere you look in Saudi Arabia, you can see growth and progress and I'm excited to be part of that," Nadal, who pulled out of the ongoing Australian Open with a muscle injury, said in a statement.
Defending champion Ons Jabeur said on Monday she had withdrawn from the Madrid Open with a calf injury after retiring from the Stuttgart Open at the weekend.
The 35-year-old Serbian remains top of the latest ATP rankings released on Monday bringing him level with the amount of weeks that Graf spent as women's world number one.
Before this week, no Chinese man had ever reached a tour-level final in the professional era or defeated a top 10 opponent.
Fritz, 25, rose to his highest career ranking despite a surprise loss to Wu Yibing in the Dallas semi-finals.
Novak Djokovic, Tunisian world number two Ons Jabeur and six other top players will form the first executive committee of the Professional Tennis Players Association (PTPA) as it fights for a seat at the table with the sport's governing organisations.
Novak Djokovic dug deep to save a match point on the way to a 6-7(8) 7-6(3) 6-4 victory over Sebastian Korda in the Adelaide International 1 final on Sunday ahead of this month's Australian Open.
Top-ranked Daniil Medvedev committed 11 double-faults in falling to Stefanos Tsitsipas 7-6 (8/6), 3-6, 6-3 in Sunday's semi-finals of the ATP and WTA Cincinnati Masters.
World number one Daniil Medvedev won his first ATP title of 2022 on Saturday, roaring past defending champion Cameron Norrie 7-5, 6-0 in the final of the hardcourt tournament in Los Cabos, Mexico.
The emotions of lifting his maiden Tour-level trophy will be hard to forget for 20-year-old Italian Lorenzo Musetti, who overcame disrupted preparations and survived a rollercoaster ride at the ATP 500 event in Hamburg.
Roger Federer showed few signs of rust after a month off following his Australian Open heroics in sending Benoit Paire packing at the Dubai Tennis Championships on Monday.
Austrian Dominic Thiem secured his eighth ATP title with a 7-5 6-4 win over Pablo Carreno Busta in the final of the Rio Open on Sunday.
Japanese top seed Kei Nishikori lost a sixth successive final on Sunday when he was defeated by Ukraine's Alexandr Dolgopolov 7-6 (7/4), 6-4 in the Buenos Aires clay-court title match.
Andy Murray and Novak Djokovic will slug it out for the world number one ranking in a high-stakes final at the ATP Tour Finals after completing their contrasting paths to the dramatic showdown.
Andy Murray remains on course for a dramatic showdown with Novak Djokovic as the world number one staged a superb fightback to defeat Milos Raonic 5-7, 7-6 (7/5), 7-6 (11/9) in the semifinals of the ATP Tour Finals.
Andy Murray is braced for the tantalising prospect of facing Novak Djokovic in the final of the ATP Tour Finals with the world number one ranking on the line.
Novak Djokovic booked his place in the semifinals of the ATP Tour Finals with an emotional 7-6 (8/6), 7-6 (7/5) victory over Milos Raonic on Tuesday.