Did Ilie Năstase and Nikola Pilić both earn the title as Romanian former world No. 1 professional tennis player?
Ilie Năstase Ilie "Nasty" Năstase (] , born 19 July 1946) is a Romanian former world No. 1 professional tennis player, one of the world's top players of the 1970s. He was ranked world no. 1 from 23 August 1973 to 2 June 1974.
Ivan Lendl Ivan Lendl (] ; born March 7, 1960) is a retired tennis player originally from Czechoslovakia who became a United States citizen in 1992. He is often considered among the greatest in the sport's history. He was the world No. 1 for 270 weeks in the 1980s and finished his career with 94 singles titles. At the majors he won eight titles and was runner-up a record 11 times. He also won seven year-end championships and a record 22 Grand Prix Super Series titles.