小威廉姆斯称频繁的药物测试是“歧视”

randomly - adv. in a way that does not follow a particular plan or pattern

discrimination - n. the practice of unfairly treating a person or group of people differently from other people or groups of people

frequent - adj. happening often

complain - v. to say or write that you are unhappy, sick, uncomfortable, etc., or that you do not like something

Grand Slam - n. one of four major tennis competitions throughout the year (Australian Open, French Open, Wimbledon and the U.S. Open)

title - n. the status or position of being the champion in a sport or other competition