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 Allan Stone tennis
Useful Output:

Doc 1: The bandleader, who has died aged 71, created a vast body of work that influenced everyone from Ramones to REM, thanks to his absurdist
Doc 2: Allan Stone Men's Singles Overview · Current rankings · Career-high rankings · Year-end Ranking · Professional win-loss record.
Doc 3: Stone won a total of 11 ATP doubles titles and was a singles finalist on four occasions, with a career-high singles ranking of No.38 in April 1975.
Doc 4: Osteoporosis is the most common metabolic bone disease in the USA and the world. It is a subclinical condition until complicated by fracture(s).
Doc 5: Dick Crealy (career high ranking: 21, 274-277 OE record) Allan Stone (165-197 record) Mal Anderson (soon-to-be 37 Y.O. that won a pro slam