Sports Records and History

Around 2009-2010 when Serena had 12 total Grand Slam titles, she had indeed won only 1 French Open title (2002). Her lone French Open victory came early in her career, and she wouldn't win her second French Open until 2013. This makes the answer correct for that timeframe.

Serena beat Justine Henin in the 2010 Australian Open final, winning 6-4, 6-3. Henin was returning from retirement that year and reached the final, but Serena defeated her in straight sets. This was one of Serena's 7 Australian Open titles overall.

Serena Williams won her first Grand Slam title at the 1999 US Open, defeating Martina Hingis in the final. This victory marked the beginning of her dominant career in tennis. The other options are incorrect as she hadn't won Wimbledon or the Australian Open until later in her career.

Venus Williams has indeed lost to Serena in 8 Grand Slam finals (4 Wimbledon, 2 US Open, 2 Australian Open), making her the opponent Serena has defeated most often in major finals. This sister rivalry is one of the most famous in tennis history. Maria Sharapova has also lost multiple times to Serena in Grand Slam finals but fewer than Venus.

In 2002, Serena Williams achieved the 'Serena Slam' by winning three consecutive Grand Slam titles: French Open, Wimbledon, and US Open. The following year (2003), she completed the full set by adding the Australian Open. This 2002-2003 period marked one of the most dominant stretches of her career.

Serena Williams defeated her sister Venus Williams in the 2009 Wimbledon final, winning 7-6, 6-2. This was one of their many meetings in Grand Slam finals and added to Serena's Wimbledon trophy collection. Venus has been Serena's opponent in multiple Wimbledon finals throughout their careers.

Serena Williams defeated Dinara Safina in the 2009 Australian Open final with a score of 6-0, 6-3. This was a dominant performance and gave Serena her 10th Grand Slam title. Safina was the World No. 1 at the time, making this victory particularly significant.

Roger Federer won his first Grand Slam at Wimbledon in 2003, defeating Mark Philippoussis. This marked the beginning of his era of dominance. The Australian Open 2002 and 2003 were won by Thomas Johansson and Andre Agassi respectively, while the French Open 2003 was won by Juan Carlos Ferrero.

Marat Safin retired from tennis after his final match at the 2009 US Open, where he lost to Juan Martin del Potro. Safin, known for his powerful game and two Grand Slam titles (2000 US Open, 2005 Australian Open), ended his career at that tournament. The scoreline matches his defeat in the fourth round of his final Grand Slam appearance.

Serena Williams was the first woman to earn over $6.5 million in a single year (2009), primarily from prize money. She dominated women's tennis with numerous Grand Slam victories and holds the record for highest single-season earnings in women's tennis.

Serena Williams was the first woman to earn over $6.5 million in a single year (2013), setting a new prize money record in tennis. This achievement highlighted both her dominance on court and the increasing financial rewards in women's tennis during that era.

Juan Martin del Potro had a 23-match winning streak as a teenager in 2007-08, which is indeed the second-longest teenage winning streak in the Open Era behind Rafael Nadal. This streak culminated in his first US Open title. The question has a minor typo ('complet' instead of 'complete') but the factual content is correct.

John Isner is 6'10 (208 cm) tall, making him the second-tallest player on the ATP Tour behind Ivo Karlovic who is 6'11 (211 cm). Del Potro and Cilic are both 6'6 (198 cm), while Murray is 6'3 (190 cm). The question has poor grammar ('d' instead of 'the', missing 'is') but the factual answer is correct.