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 tennis player reached a higher World singles ranking, Allan Stone or Kevin Curren?" whose answer is Kevin Melvyn Curren.
Each document should contain about 30 words, and these documents should contain useful information.

Query: peak ranking of Kevin Curren tennis
Useful Output:

Doc 1: His 8–6 win in the fifth set over 12th seed Kevin Curren in the semi  Her highest world ranking was 17. Julie Richardson and
Doc 2: This is an original press photo. Kevin Curren, University of Texas, hits backhand return in finals; tennisPhoto measures 8 x 10.25inches. Photo is dated 3-25-
Doc 3: Kevin Curren vs Guillermo Perez Roldan at Ultimate Tennis Statistics.  Kevin Curren. vs. Guillermo  Peak Elo Rating, 2057 (12-06-1989). 130 (25), GOAT
Doc 4: Curren has 14 Grand slam doubles titles, five top-level singles titles, and 26 doubles titles. He had his highest ranking ever in 1983 as world
Doc 5: 1. Wayne Ferreira (South Africa) · 2. Younès El Aynaoui (Morocco) · 3. Johan Kriek (South Africa) · 4. Bob Hewitt (South Africa) · 5. Kevin Curren (