24/7

Part 1 of HBO's exclusive look into the upcoming fight between Floyd Mayweather Jr. and Juan Manuel Marquez.

Part 2 of HBO's exclusive look into the upcoming fight between Floyd Mayweather Jr. and Juan Manuel Marquez.

Part 3 of HBO's exclusive look into the upcoming fight between Floyd Mayweather Jr. and Juan Manuel Marquez.

HBO cameras follow the NHL's Pittsburgh Penguins and Washington Capitals around their daily activities as they move closer the Winter Classic outdoor hockey game on January 1st. Each teams' demeanor starkly contrast with each other. The Penguins are having fun and enjoying their work as they are in the middle of a long winning streak while the capitals are shown as downtrodden and depressed while they suffer through their longest losing streak in years.

The Penguins and Capitals fight for first place in their respective Eastern Conference divisions. Following a home game versus Anaheim, the Caps head to Boston and Ottawa. Meanwhile, the Pens visit their in-state rivals in Philadelphia for a significant Atlantic Division showdown before hosting the New York Rangers and Phoenix Coyotes.

Preparations begin in Pittsburgh to set up the hockey rink at Heinz Field. Also: the teams face each other on the ice in Washington.

Boxers Floyd Mayweather and Victor Ortiz train for their September 2011 bout in the opener of this reality series, which follows preparations leading up to their welterweight-title fight in Las Vegas.

As training camp activities heat up, both fighters find time to alter the routine, as Mayweather goes car shopping and Ortiz does an interview with Piers Morgan.

With the welterweight title showdown just a week away, the intensity of training camp goes up a notch and both camps sharpen their game plan.

The fighters open training camps, with Manny Pacquiao working in Baguio City, and Juan Manuel Marquez in Mexico City.

Manny Pacquiao settles in training in Los Angeles and acquires an expensive new toy; Juan Manuel Marquez continues his training in the altitude of Mexico City with a new conditioning coach.

Training intensifies with a week remaining until the fight.

Super welterweights Miguel Cotto and Antonio Margarito train for their Dec. 3 fight, and look back at their first encounter.

Super welterweights Miguel Cotto and Antonio Margarito train for their Dec. 3 fight.

Part 1 of HBO's exclusive look into the preparations by the New York Rangers and Philadelphia Flyers for the 2012 Winter Classic.

The Flyers' winning streak continues as they head into a big game against the Stanley Cup-champion Bruins. However, there is bad news on the injury front. The Rangers hit a rough patch on the road.

The Flyers and Rangers square off at Madison Square Garden prior to their showdown in the Winter Classic. The transformation of Citizens Bank Park, site of the outdoors game, continues.

Part 1 of HBO's exclusive look into the training camps of Floyd Mayweather and Miguel Cotto.

Part 2 of HBO's exclusive look into the training camps of Floyd Mayweather and Miguel Cotto.

Part 3 of HBO's exclusive look into the training camps of Floyd Mayweather and Miguel Cotto.

Home visits with the fighters in the Philippines (Manny Pacquiao) and Mexico City (Juan Manuel Marquez).

24/7 is HBO's reality series that goes behind-the-scenes with athletes as they prepare for future matchups. The series debuted in 2007 with a look at Oscar De La Hoya and Floyd Mayweather Jr. as they prepared to face each other for the junior-middleweight title. Later seasons focused on other boxing matchups, in addition to NASCAR driver Jimmie Johnson and multiple NHL teams.

24/7 is HBO's reality series that goes behind-the-scenes with athletes as they prepare for future matchups. The series debuted in 2007 with a look at Oscar De La Hoya and Floyd Mayweather Jr. as they prepared to face each other for the junior-middleweight title. Later seasons focused on other boxing matchups, in addition to NASCAR driver Jimmie Johnson and multiple NHL teams.