John Robert Isner (born April 26, 1985) is an American professional tennis player. He achieved his career-high rank of no. 9 on March 19, 2012, and is currently the second highest-ranked American tennis player. His most famous victories were against Roger Federer in the Davis Cup encounter in February 2012, Top seed Novak Djokovic at the 2012 Masters 1000 tournament in Indian Wells, Andy Roddick in the 2009 US Open, and against Nicolas Mahut at the 2010 Wimbledon Championships where he played the longest ever professional tennis match, which lasted 11 hours and 5 minutes over the course of three days.

Unlike many top tennis players, who have brilliant juniors careers and hit the ATP Tour in their teens, Isner didn't decide that he wanted to play professional tennis until he was 21.

Isner played collegiate tennis at the University of Georgia from 2004 to 2007 and became the school's all-time leader in singles and doubles victories, earning All-American honors each of his four years and leading Georgia to the 2007 NCAA championship.

Roger Federer (German pronunciation: [ˈfeːdəʁɐ]) (born 8 August 1981) is a Swiss professional tennis player who held the ATP No. 1 position for a record 237 consecutive weeks from 2 February 2004 to 18 August 2008. Federer has occupied the #1 ranking for 285 overall weeks, one week short of the record 286 weeks held by Pete Sampras. As of 28 May 2012, he is ranked World No. 3. Federer has won a men's record 16 Grand Slam singles titles. He is one of seven male players to capture the career Grand Slam and one of three (with Andre Agassi and Rafael Nadal) to do so on three different surfaces (clay, grass, and hard courts). He is the only male player in tennis history to have reached the title match of each Grand Slam tournament at least five times and also the final at each of the nine ATP Masters 1000 Tournaments. Many sports analysts, tennis critics, and former and current players consider Federer to be the greatest tennis player of all time.

Federer has appeared in an unprecedented 23 career Grand Slam tournament finals, including a men's record ten in a row, and appeared in 18 of 19 finals from the 2005 Wimbledon Championships through the 2010 Australian Open, the lone exception being the 2008 Australian Open. He holds the record of reaching the semifinals or better of 23 consecutive Grand Slam tournaments over five and a half years, from the 2004 Wimbledon Championships through the 2010 Australian Open. At the 2012 Australian Open, he reached a record 31st consecutive Grand Slam quarterfinal. During the course of his run at the 2012 French Open in Roland Garros, Federer eclipsed Jimmy Connors long standing record of 233 match wins in Grand Slam tournaments when he defeated Adrian Ungur in a second round match.