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: "who has the most grand slam titles men's tennis?" whose answer is Roger Federer.
Each document should contain about 30 words, and these documents should contain useful information.

Query: most Grand Slam titles men's tennis
Useful Output:

Doc 1: The tennis open era began in 1968 and the Grand Slam tournaments are the 4 most important annual tennis events.
Doc 2: Who has won the most Grand Slam major singles titles in the Men's game? ALL-TIME. PLAYER, AO, FO, WI, US, TOT. Novak Djokovic, 10-0, 3
Doc 3: Djokovic, who clinched his latest Grand Slam title at the 2023 US Open, now stands at the top of the pile with a staggering 24 titles in total
Doc 4: Men's Grand Slam Title Winners ; 2021 · 2020 · 2020 ; Australian Open · French Open · U.S. Open ; Novak Djokovic · Rafael Nadal · Dominic Thiem
Doc 5: Novak Djokovic broke the record for 24 Grand Slam titles; that is a marvelous feat in the world of tennis. It is different-surface dominance and