Question: Which professional tennis player achieved a higher World ranking, Bob Lutz or Goran Ivanišević?
Related documents: [0]  [DOC] Robert Lutz (born August 29, 1947) is a former amateur and professional tennis player of the 1960s and 1970s. He and his longtime partner Stan Smith were one of the best doubles teams of all time. Bud Collins ranked Lutz as World No. 7 in 1972. Between 1967 and 1977 he was ranked among the top-10 American players 8 times, with his highest ranking being No. 5 in both 1968 and 1970. [END] 
[1]  [DOC] Goran Ivanišević (; born 13 September 1971) is a retired Croatian professional tennis player and current tennis coach. He is the only person to win the men's singles title at Wimbledon as a wildcard. He achieved this in 2001, having previously been runner-up at the championships in 1992, 1994 and 1998. Before the 2001 tournament, he was ranked 125th and after his victory he was 16th. His career-high singles ranking was World No. 2 (behind Pete Sampras) in 1994. He coached Marin Čilić from September 2013 to July 2016, leading Čilić to his biggest achievement to date, the 2014 US Open title. [END] 
Answer: 
Goran Ivanišević
Goran Ivanišević