The 43-year-old mogul — who is mourning the loss of her Aunt Karen — was dressed in a white Balenciaga look, topping the outfit with a black baseball cap.
Meanwhile, the 46-year-old rapper-turned-designer contrasted her in an all-black ensemble that included Nike sneakers — an apparent dig at his failed Adidas partnership.
The exes were equally casual as Kardashian wore a fitted, crew neck white T-shirt tucked into baggy sweatpants and West wore a hooded sweatshirt.
At the sporting event, the Chicago-bred music artist showed his amicable relationship with the reality television star as he embraced her with one arm.
Underneath her hat, Kim plaited her long, jet black hair in two braids set on either side of her head.
Her drawstring lounge pants were punctuated with a pair of chunky gray and white sneakers.
The fashionista also carried a fuzzy white Balenciaga purse with silver-toned chain straps on her shoulder.
She flaunted her signature short, nude manicure as she carried her black encased iPhone.
At times during the outing Kim wore a pair of sporty, metallic, oval-shaped sunglasses.
The Vultures artist, whose wife Bianca Censori was not present, also wore sleek shades in black.
He layered a T-shirt underneath his sweatshirt and slipped his feet into a pair of black Nike sneakers with the brand’s swoosh logo in white.
The YZY designer wore black gloves on his hands and rocked a low haircut and full beard.
Little Saint looked adorable in a black, gray, and white basketball jersey and lime green Nike sneakers.
The sides of his curly hair were cut low, and the longer locks at the top were bleach blonde.
Cici Bussey, the first cousin of Kim’s late father Robert Kardashian, was with her on Friday.
Cici, who has made numerous appearances on the Kardashian family’s TV shows, wore a long, suede, tan coat.
Both Kim and Kanye took turns showing affection to their son during the basketball event.
During one moment, Ye lovingly wrapped an arm around Saint and appeared to give him encouraging words.
In addition to Saint, their second child, the former couple also share North, 10, Chicago, six, and Psalm, who turns five in May.
The SKIMS founder often shares outtakes from her life as a mother-of-four online.
As for Kanye, he often posts glimpses at his Australian wife, who is 28-years-old.
On Friday he shared a photo of Censori in their massive bed with white linen as she lay in the center and scrolled on her phone.
In the image she wore a sleeveless, figure-hugging lacy white and matching white heels.
The Melbourne native, who has worked as an architectural designer at Yeezy since November 2020, was surrounded by multiple plush pillows.