Serving in Squash:

In squash, the serve is initiated from within a designated service box. The server has the option to start from either the right or left box, alternating after each point is scored. The ball, after being served, must hit the front wall above the service line and below the out line, and it must land in the opposite quarter of the court from where it was served, without touching the back wall on the fly. Importantly, in squash, the server must have part of one foot in contact with the floor inside the service box until the ball is struck.

Serving in Racquetball:

Racquetball rules for serving are somewhat different. The server begins inside the service box and must bounce the ball before hitting it, aiming to get the ball to strike the front wall first. The ball must then bounce past the short line, which is located about a third of the way back in the court, but before bouncing, it can hit one of the side walls. Similar to squash, the serve must be legal, failing which a fault serve is called. The server continues to serve until losing a rally, at which point the service passes to the opponent. Unlike squash, there is no requirement to alternate the foot position or to keep a foot in contact with the floor. Additionally, racquetball allows for two attempts at a legal serve, whereas squash typically offers only one chance.