Problem: Heifetz was born into a Russian-Jewish family in Vilna, Lithuania then part of the Russian Empire. His father, Reuven Heifetz, son of Elie, was a local violin teacher and served as the concertmaster of the Vilnius Theatre Orchestra for one season before the theatre closed down. While Jascha was an infant, his father did a series of tests, observing how his son responded to his fiddling. This convinced him that Jascha had great potential, and before Jascha was two years old, his father bought him a small violin, and taught him bowing and simple fingering.

Heifetz married silent motion picture actress Florence Vidor (1895-1977), ex-wife of King Vidor, in 1928, and adopted her daughter, Suzanne. The couple had two more children, Josefa (born 1930) and Robert (1932-2001) before divorcing in 1945. In 1947, Heifetz married Frances Spielberger Spiegelberg (1911-2000), with whom he had another son, Joseph (known as Jay). The second marriage ended in divorce in 1962. Heifetz's son Jay is a professional photographer. He was formerly head of marketing for the Los Angeles Philharmonic and Hollywood Bowl, and the Chief Financial Officer of Paramount Pictures' Worldwide Video Division. He lives and works in Fremantle, Western Australia. Heifetz's daughter, Josefa Heifetz Byrne, is a lexicographer, the author of the Dictionary of Unusual, Obscure and Preposterous Words. Heifetz's grandson Danny Heifetz is an accomplished drummer/percussionist. Heifetz's extended family was active in Los Angeles progressive political circles in addition to music and art: they include artist Frances Heifetz-Bloch and her husband Kalman Bloch and daughter Michele Zukovsky--co-principal clarinetists for the Los Angeles Philharmonic--and son Gregory Bloch, violinist for the Italian rock band Premiata Forneria Marconi, It's A Beautiful Day, and member of the Saturday Night Live Band from 1978-80. Although Heifetz had a "difficult" personality, and has even been described as "misanthropic", he enjoyed the company of selected friends who zealously guarded his privacy, he spoke several languages including flawless English, and was an avid bridge and ping-pong player. His childhood had been difficult; his father was an extremely stern man who, even after Jascha had become the family's sole breadwinner, would still roundly criticise every performance.

did he remarry?

Answer with quotes: In 1947, Heifetz married Frances Spielberger Spiegelberg (1911-2000), with whom he had another son, Joseph (known as Jay). The second marriage ended in divorce in 1962.

Problem: Roger Federer (German pronunciation: ['rodZ@r 'fe:d@r@r]; born 8 August 1981) is a Swiss professional tennis player who is currently ranked world No. 2 in men's singles tennis by the Association of Tennis Professionals (ATP). He is regarded by many fans, players and analysts as the greatest tennis player of all time. Federer has won 20 Grand Slam singles titles--the most in history for a male player--and has held the world No. 1 spot in the ATP rankings for a record total of 308 weeks, including 237 consecutive weeks. After turning professional in 1998, he was continuously ranked in the top ten from October 2002 to November 2016.

The 2006 season was statistically the best season of Federer's career. In November 2011, Stephen Tignor, chief editorial writer for Tennis.com, ranked Federer's 2006 season as statistically the second-best season of all time during the Open Era, behind Rod Laver's Grand Slam year of 1969. Federer won 12 singles titles (the most of any player since John McEnroe in 1984) and had a match record of 92-5 (the most wins since Ivan Lendl in 1982). Federer reached the finals in an astounding 16 of the 17 tournaments he entered during the season. In 2006, Federer won three Grand Slam singles titles and reached the final of the other, with the only loss coming against Nadal in the French Open. This was Federer and Nadal's first meeting in a Grand Slam final. He was the first man to reach all four finals in a calendar year since Rod Laver in 1969. Federer defeated Nadal in the Wimbledon Championships final. In the Australian Open, Federer defeated Marcos Baghdatis, and at the US Open, Federer defeated Roddick (2003 champion). In addition, Federer made it to six ATP Masters Series 1000 finals, winning four on hard surfaces and losing two on clay to Nadal. Federer, however, consistently pushed Nadal to the limit on clay throughout the season taking him to fourth-set tiebreakers in Monte-Carlo and Paris, and a thrilling match in Rome that went to a deciding fifth-set tiebreaker. Federer won one ATP 500 series event in Tokyo and captured the year-end championships for the third time in his career, again finishing the year as world No. 1. Federer only lost to two players during 2006, to Nadal four times in finals, and to 19-year-old Andy Murray in the second round of the 2006 Cincinnati Masters, in what would be Federer's only defeat before reaching the final of a tournament that year. Federer finished the season on a 29-match winning streak, as well as winning 48 of his last 49 matches after the French Open. A personal highlight for Federer came near the end of the season when he won his hometown tournament, the Swiss Indoors in Basel, Switzerland for the first time, having finished runners up in 2000 and 2001, and missing the tournament in 2004 and 2005 due to injuries.

what were some of his statistics?

Answer with quotes:
Federer won 12 singles titles (the most of any player since John McEnroe in 1984) and had a match record of 92-5 (the most wins since Ivan Lendl in 1982).