(CNN) -- The stars of tennis took time out from their French Open preparations Sunday to honor the man who helped them become some of the highest-paid athletes in the world. 

Brad Drewett passed away Friday, aged 54, succumbing to the motor neurone disease that had forced him to step down as head of the men's ATP World Tour. 

Novak Djokovic, Roger Federer, Rafael Nadal, Andy Murray and Serena Williams led a minute's silence ahead of the start of the Madrid Masters, while similar tributes were held at tournaments in Portugal and Germany. 

"Brad wasn't just the president of the ATP but was a player himself, a board member," Federer said on the ATP website. 

"He's given so much time and effort to the ATP, and I think this is really what we will try to honor in a small way today." 

Drewett reached a career-high 34 in the world rankings, but his efforts in administration had far bigger impact on the game, from his time on the players' council to running the ATP's Middle East, Asia and Pacific operations before becoming president in early 2012. 

The Australian took the end-of-season championship to China as part of tennis' global spread in the early 2000s, and then brought it to London where it has become a lucrative moneyspinner and showpiece for the ATP. 

He has also been credited with getting the players a larger share of prize money from the four grand slam tournaments since he took over the top role a year and half ago.  QUESTIONS:

Q1:
1. What tennis star is at the center of the article?
2. Which master of tennis is the article's subject?
3. 
Q2:
1. What did Novak Djokovic, Roger Federer, Rafael Nadal, Andy Murray and Serena Williams do?
2. What action did Novak Djokovic, Roger Federer, Rafael Nadal, Andy Murray and Serena Williams perform?
3. 
Q3:
1. Who died?
2. What was the name of the person that passed?
3. 
Q4:
1. When did Brad Drewett pass away?
2. On what day did Brad Drewett die?
3. 
Q5:
1. What was Brad Drewett's age at the time of his death?
2. How old was Brad Drewett at the time of his passing?
3. 
Q6:
1. What was Brad Drewett suffering from?
2. What disease did Brad Drewett have?
3. 
Q7:
1. What were Roger Federer's words regarding Brad Drewett?
2. What message did Roger Federer put out about Brad Drewett?
3. 
Q8:
1. How old was Brad Drewett at the height of his career?
2. What was Brad Drewett's age at the peak of his career?
3. 
Q9:
1. Did Brad Drewett's administrative efforts have a big impact on the tennis game?
2. Was the game of tennis largely influenced by the effort Brad Drewett put into administration?
3. 
Q10:
1. When was Brad Drewett put in charge of something?
2. In what year was Brad Drewett made a president?
3. 
Q11:
1. Where did Brad Drewett take an end of seasons championship?
2. What country was Brad Drewett in when he had an end of seasons championship?
3. 
Q12:
1. When did Brad Drewett move a championship to China?
2. When was Brad Drewett in China moving the champsionship?
3. 
Q13:
1. Did Brad Drewett share a large amount of prize money from the four grand slam tournaments?
2. Did Brad Drewett spread around the money won at four grand slam tournaments?
3. 
Q14:
1. When did Brad Drewett start running the ATP?
2. When did Brad Drewett take over top role at the ATP?
3. 
