The presence of the Big Four is generally seen to have had a positive impact on tennis, making the sport more exciting and in turn attracting more attention.
Separately, it has been claimed that the current era in tennis should be seen as having a "Big Five", with Juan Martín del Potro,[REF] Marin Čilić[REF] and Stanislas Wawrinka[REF][REF][REF] suggested as expanding the Big Four.