(CNN) -- They share the same surname -- Djokovic -- but for now at least, that is where the similarity ends. 

Novak is at the pinnacle of his sport and was the center of attention in Dubai after completing in his first victory since winning the Australian Open in January. 

At 20, Marko is four years younger, and 868 places further down the rankings -- and on Monday he slumped to an opening-round defeat in front of his elder sibling. 

Djokovic senior was on hand to watch his brother's elimination, at the hands of Russian qualifier Andrey Golubev, but says that Marko can make his mark in the upper echelons of the game. 

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"He has to face the pressure of having the Djokovic surname," Novak said in quotes carried by AFP. 

"He's trying to fight with his mind more than with his game. When he is able to focus on that and not on his doubts he can become a world-class player." 

He admitted it was tough to watch Marko's 6-3 6-2 reverse. "It was difficult for me to sit courtside," he said. "I have not done it too much. 

"At least when I'm playing I know what's going on. But I was happy my brother got a wild card. He is not at his level yet, but he's getting there." 

As for Marko, he said there were plenty of positives and negatives to being the brother of the world's No. 1 player.  QUESTIONS:

Q1:
1. How far apart in rank are the Djokovic brothers?
2. How far down in the rankings is Marko from Novak?
3. How far up in rank is Novak from Marko?
Q2:
1. What sport do the Djokovic brothers play?
2. What sport do Novak and Marko play?
3. What sport is practiced by Novak and Marko
Q3:
1. What is the relationship between Marko and Novak?
2. How are Marko and Novak related to each other?
3. What is the familial relation of Marko to Novak?
Q4:
1. Which of the Djokovic brothers is the superior player?
2. Who is the better player: Marko or Novak?
3. Who is the superior player between Marko and Novak?
Q5:
1. What is the age difference between the Djokovic brothers?
2. How much older is Novak than Marko?
3. How much younger is Marko than his brother?
Q6:
1. Who was present to watch Marko lose?
2. Who was sitting courtside during Marko's loss?
3. Who was in attendance when Marko lost?
Q7:
1. Who eliminated Marko Djokovic?
2. Who bested Marko Djokovic?
3. Who was the winner of Marko Djokovic's game?
Q8:
1. Where is Andrey Golubev from?
2. What country is Andrey Golubev from?
3. What country does Andrey Golubev come from?
Q9:
1. Is Novak Djokovic considered to be a good player?
2. Is Novak Djokovic regarded as an excellent player?
3. Do people consider Novak Djokovic to be at the top of his game?
Q10:
1. What big match has Novak Djokovic won?
2. What important event did Novak Djokovic win?
3. What well-known event was Novak Djokovic champion at?
Q11:
1. When did Novak Djokovic win the Australian Open?
2. In what month was Novak Djokovic champion of the Australian Open?
3. In what month did the Australian Open won by Novak Djokovic take place?
Q12:
1. How did Novak Djokovic feel about watching his younger brother lose?
2. How did it feel for Novak Djokovic to sit courtside at his brother's losing match?
3. What were Novak Djokovic feelings about watching his brother lose?
Q13:
1. what pressure does Marko Djokovic face?
2. What seems to be putting pressure on Marko Djokovic?
3. What factor seems to be causing an issue for Marko Djokovic?
Q14:
1. What kind of card was Marko Djokovic granted?
2. What card was given to Marko Djokovic?
3. What card was Novak Djokovic happy his brother received?
Q15:
1. What is the worlwide rank of Marko Djokovic's brother?
2. What is the rank of Novak Djokovic?
3. Where does Novak Djokovic rank among tennis players worldwide?
Q16:
1. In what context is Novak Djokovic no. 1 tennis player?
2. Novak Djokovic is no. 1 in tennis out of what group of people?
3. By what metric is Novak Djokovic ranked the top tennis player?
Q17:
1. Does Marko have mixed feelings about his brother's success?
2. Is Novak's success tough on Marko?
3. Is Marko not sure how to feel about his brother's prowess?
Q18:
1. Does Novak Djokovic believe in his brother?
2. Does the brother of Marko Djokovic have faith in him?
3. Is Novak Djokovic rooting for his little brother?
Q19:
1. According to Novak, what does his brother need to do to improve?
2. What does Novak think his brother needs to do in order to get better?
3. How will Marko get better at tennis, according to his brother?
Q20:
1. What does Novak think that Marko needs to focus on?
2. What should Marko focus on, in the eyes of his brother?
3. In Novak's words, what must his brother focus on in order to improve?
