subquestion: Who is the oldest male Grand Slam winner according to Guinness World Records 2024?
answer: Rohan Bopanna
subquestion: Where is his hometown?
answer: Bangalore
subquestion: What's Bangalore's cricket team?
answer: Royal Challengers Bengaluru
subquestion: Who is the current coach of Royal Challengers Bengaluru?
answer: Andy Flower
Final answer: Andy Flower