Wiktionary
individual sport
n. A sport which is practiced by two opposing individuals or one individual.
Wikipedia
Individual sport
An individual sport is a sport in which participants compete as individuals.
Usage examples of "individual sport".
Point is, prosecuting is an individual sport, and if he lost he'd have no one to blame but himself.
Silverberg will go on and on telling you that science is a collective and not really an individual sport these days.