You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Which professional tennis player achieved a higher World ranking, Bob Lutz or Goran Ivanišević?" whose answer is Goran Ivanišević.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Bob Lutz tennis world ranking
Useful Output:

Doc 1: Facing 59th-ranked Shaun Stafford in the first round, Venus stunned the tennis world by winning 6–3, 6–4. Her powerful serve and athleticism
Doc 2: Born in 1982, he reached a career-high ranking of World No. 3 in  New rackets releases - Spring 1979 - Tennis World Magazine . 更多.
Doc 3: 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
Doc 4: In 1972 Lutz was briefly the 7th-ranked best male player in the world. Although mainly known as a doubles player, between 1967 and 1977 he was
Doc 5: Hosts Eugene and Lucy talk all things black tennis. Black Spin Global: The Podcast is a show that shines a light on the black players on the WTA and ATP