Background: Safin was born in Moscow to Tatar parents, Mubin ("Mikhail") Safin and Rauza Islanova. He speaks Russian, English, and Spanish as well as his native Tatar. His parents are former tennis players and coaches. His younger sister, Dinara, is a former world number one professional tennis player and silver medalist at the 2008 Olympic Games in Beijing.
Context: A succession of injuries hindered Safin's progress throughout his career.  In 2003, he missed the majority of the season due to a wrist injury.  During the 2005 clay-court season, Safin suffered a knee injury, which he played through all the way up to Wimbledon with the help of pain killers and anti-inflammatories. Safin was subsequently defeated in the early rounds of each of the seven tournaments he played between the Australian Open and the French Open, culminating in an early round defeat at the French Open. Safin made a surprise finals appearance at the Wimbledon tune-up tournament in Halle on grass. He lost the final narrowly to the defending champion, Federer. He only played one tournament in the summer hard-court season, in Cincinnati, where he lost in the quarterfinals to Robby Ginepri. He also missed the Tennis Masters Cup.  Injuries continued to bother Safin in 2006. Although Safin made appearances at the 2006 ATP Masters tournaments at Indian Wells, Miami, Monte Carlo, Rome and Hamburg, his ranking plummeted to as low as No. 104. He began to recover in time for the 2006 US Open, in which Safin defeated Argentine David Nalbandian, who was then world No. 4 in a riveting second-round match. Safin then lost in the fourth round to former world No. 2 German Tommy Haas, also in a fifth-set tiebreaker. Positive performances at the Thailand Open, where he was narrowly edged out by No. 7 seed, James Blake, and the Kremlin Cup in Moscow, the first all-Russian final at that event, losing to compatriot, Ukrainian-born Nikolay Davydenko, marked Safin's recovery. Despite the injury, Safin still posted 7 wins against top ten players in 2006, fourth-most on the ATP tour behind just Federer (19), Nadal (10), and Blake (8).
Question: Has he ever been injured during a match?
Answer: 

Background: Blood, Sweat & Tears (also known as "BS&T") is a jazz-rock American music group. They are noted for their combination of brass and rock band instrumentation. The group recorded songs by rock/folk songwriters such as Laura Nyro, James Taylor, the Band and the Rolling Stones as well as Billie Holiday and Erik Satie. They also incorporated music from Thelonious Monk and Sergei Prokofiev into their arrangements.
Context: Clayton-Thomas left in early January 1972 to pursue a solo career. He was briefly replaced by Bobby Doyle and then Jerry Fisher, who went on to front the next incarnation of Blood, Sweat & Tears. Fred Lipsius left as well and was briefly replaced by Joe Henderson, before Lou Marini settled into the new lineup. Another founding member, Dick Halligan, also departed, replaced by jazz pianist Larry Willis (from the Cannonball Adderley Quintet), and Swedish guitarist Georg Wadenius, from the popular Swedish outfit Made in Sweden, joined as lead guitarist around the same time.  The new edition of Blood, Sweat & Tears released New Blood in September 1972, which found the group moving into a more overtly jazz-fusion repertoire. The album broke through the Top 40 chart (the last BS&T LP to do so) and spawned a single ("So Long Dixie", chart peak: 44) that received some airplay. Also included on the record was a cover version of Herbie Hancock's "Maiden Voyage", featuring the voice/guitar soloing of Georg Wadenius.  In mid-1973, Katz left to pursue a career as a producer (for Lou Reed and others). Winfield departed as well and was replaced by Tom Malone.  Blood, Sweat & Tears' next album, No Sweat (June 1973), continued in a jazz-fusion vein and featured intricate horn work. Tom Malone's stay in the band was brief and he left to make way for jazz trumpeter John Madrid. But Madrid's tenure was likewise short-lived and he never recorded with the band. Both Madrid and Soloff left in early 1974, making way for new horn player/arranger Tony Klatka on their next release, Mirror Image (July 1974), which also saw the addition of vocalist/saxophonist Jerry LaCroix (formerly of Edgar Winter's White Trash), sax player Bill Tillman, bassist Ron McClure and the exodus of original bass player Jim Fielder. This recording features the adoption of a sound pitched between Philly Soul and the mid-1970s albums by Herbie Hancock's Headhunters, along with aspirations to Chick Corea's jazz-fusion group Return to Forever.  Jerry LaCroix left BS&T to join Rare Earth after playing his final show with them at Wollman Rink in New York's Central Park on July 27, 1974. Luther Kent, a blues singer from New Orleans, was recruited to replace LaCroix.
Question: What is the Jerry Fisher era?
Answer:
He was briefly replaced by Bobby Doyle and then Jerry Fisher, who went on to front the next incarnation of Blood, Sweat & Tears.