When Monica and Quincy are playing basketball for Quincy's heart, the Nike swoosh on Monica's sports bra appears and disappears.
At the dance, Monica tells her date she feels hot, so Jason goes to get her some punch. Quincy comes over to talk to Monica, then has an awkward moment when Jason returns and takes Monica onto the dance floor. Jason never has or mentions punch.
When Quincy sees Monica getting home from work, she takes off her shoes and holds them in her hand. After they finish talking, she is wearing shoes, and walks into her house.
When Monica gets home from the dance, she throws her keys on her desk. When she reaches for her letter from USC, her keys are under the envelope.
During the final one-on-one basketball scene, Quincy and Monica both have the ball in one shot.
Some of the high school players' numbers end in 6, 7, 8, or 9, which is not allowed in high school basketball.
Quincy's friends are playing the Nintendo game Double Dribble, but the beeping and other sound effects heard are not in that game.
Omar Epps' tattoo is visible during the love scene, despite being covered with make-up.
Quincy walks through his house in a pair of Jordan XI's, which were released in 1996.
The interlocked "SC" logo appears in numerous shots, particularly during the women's practices and games in the gym. That logo was designed in 1993, and was first used that fall. The script "uSc" logo was heavily used before that. It appears in other places throughout the film, including the men's basketball team shorts and the coach's door.
In 1981, when the movie begins, Quincy's father plays for the Clippers. However, the family lives, and his father plays, in Los Angeles. The Clippers didn't move from San Diego until 1984.
Dominos pizza box logo that did not exist until 1996.
"Candy Girl" by New Edition is featured in the First Quarter scene at the beginning, when the kids are playing basketball. The scene takes place in 1981 and "Candy Girl" was released in 1983.
When Quincy is kissing a girl in front of her car, in the background, the shadow of the crew microphone can be seen on the grass.
When Monica is playing for Barcelona in the Euro Championship, she encounters her former college teammate (Sidra), who is playing for the opponent (Parma). One would assume that there would be a lot of game-planning and film watching prior to a big game such as this. Despite this, both are surprised to see the other in the hallway leading up to the court.