(CNN)John Isner could not keep the United States in the Davis Cup on Sunday, so it was likely small consolation that his incredible tennis milestone remained unbeaten. 

While the American lost to Andy Murray in Scotland, putting Great Britain into the quarterfinals of the prestigious teams event, halfway across the world an absorbing battle was playing out between two of South America's most bitter rivals. 

In the end it didn't come close to matching Isner's 11-hour marathon against Nicolas Mahut at Wimbledon in 2010, but the fourth rubber in the clash between Argentina and Brazil made its own piece of history. 

For six hour and 43 minutes, Leonardo Mayer and Joao Souza contested the second-longest singles match in tennis history -- and third longest of any format after a seven-hour doubles clash between Switzerland and the Czech Republic in 2013. 

Mayer eventually triumphed, after his 11th match point, winning 7-6 (7-4) 7-6 (7-5) 5-7 5-7 15-13 in front of a delirious home crowd in Buenos Aires to send the tie to a deciding rubber. 

It set the scene for Federico Delbonis to take on Brazil's Thomaz Bellucci in the decider -- with the winner to earn a clash with Novak Djokovic's Serbia, a 5-0 victor over Balkan rival Croatia. 

Delbonis had won the first set 6-3 when play was halted for the day due to bad light. The match will resume on Monday. 

Meanwhile, back in Glasgow, the British team celebrated after earning a home quarterfinal clash with France on July 17-19, the weekend after the completion of Wimbledon.  QUESTIONS:

Q1:
1. Who was not able to retain hold of the David Cup when the report came out on Sunday??
2. Who didn't succeed in keeping the Davis Cup as of Sunday?
3. 
Q2:
1. Who did John Isner lose to?
2. Who was John Isner bested by?
3. What player defeated John Isner?
Q3:
1. Where did John Isner play Andy Murray?
2. Where did the John Isner-Andy Murray match take place?
3. Where did Andy Murray face off against John Isner?
Q4:
1. What nation is represented by Andy Murray?
2. What country does Andy Murray play for?
3. Which nation does Andy Murray play on behalf of?
Q5:
1. Who participated in the second longest singles match ever?
2. Which players were in the second longest singles match in history?
3. Who faced who in the world's second longest singles match?
Q6:
1. How long was the match between Leonardo Mayer and Joao Souza?
2. How long did Leonardo Mayer and Joao Souza play against each other?
3. What was the length of time of the Leonardo Mayer and Joao Souza match?
Q7:
1. What countries did Leonardo Mayer and Joao Souza represent?
2. Which nations were respectively represented by Leonardo Mayer and Joao Souza?
3. What countries did Leonardo Mayer and Joao Souza play on behalf on?
Q8:
1. Whose 2010 Wimbledon match lasted 11 hours?
2. Who played for 11 hours at the 2010 Wimbledon?
3. During Wimbledon in 2010, who played a match that lasted 11 hours?
Q9:
1. What did the British team have to celebrate while in Glasgow?
2. What was the subject of celebrations for the British team while in Glasgow?
3. What made the British team break out in festivities at Glasgow?
Q10:
1. Which player won their first set 6-3, that is going to resume?
2. Whose 6-3 match is going to resume, which he did win?
3. 
