Wilt Chamberlain and Muhammad Ali pose during a 1971 photo shoot for a proposed boxing match between the two superstars.The bout never happened after Chamberlain, who was to be trained by Cus D’Amato, requested a tax-free guarantee of $500,000 that could not be granted by promoters. (Bettman/Corbis)
SI VAULT: The Ali-Chamberlain fight that almost happenedGALLERY: Rare, undiscovered photos of Muhammad AliGALLERY: Rare photos of Wilt Chamberlain

Wilt Chamberlain and Muhammad Ali pose during a 1971 photo shoot for a proposed boxing match between the two superstars.The bout never happened after Chamberlain, who was to be trained by Cus D’Amato, requested a tax-free guarantee of $500,000 that could not be granted by promoters. (Bettman/Corbis)

SI VAULT: The Ali-Chamberlain fight that almost happened
GALLERY: Rare, undiscovered photos of Muhammad Ali
GALLERY: Rare photos of Wilt Chamberlain

Dominique Wilkins in midair at the 1990 Slam Dunk Contest. Wilkins defeated Kenny Smith and defending champion Kenny Walker to join Michael Jordan  as the only two-time winners (joined since by Harold Miner, Jason Richardson and Nate Robinson). The NBA lockout is currently in its 106th day. (Walter Iooss Jr./SI)
GALLERY: NBA Slam Dunk Contest WinnersROUNDTABLE: Discussing NBA’s labor feudAMICK: Agent blasts Stern for labor talksLOWE: NBA’s action won’t help union’s case

Dominique Wilkins in midair at the 1990 Slam Dunk Contest. Wilkins defeated Kenny Smith and defending champion Kenny Walker to join Michael Jordan as the only two-time winners (joined since by Harold Miner, Jason Richardson and Nate Robinson). The NBA lockout is currently in its 106th day. (Walter Iooss Jr./SI)

GALLERY: NBA Slam Dunk Contest Winners
ROUNDTABLE: Discussing NBA’s labor feud
AMICK: Agent blasts Stern for labor talks
LOWE: NBA’s action won’t help union’s case

Kobe Bryant points an angry finger at Rajon Rondo during the second half of a 2009 Celtics-Lakers game. Unfortunately, these two rivals aren’t going to match up anytime soon as the NBA lockout appears no closer to a resolution than before the latest round of negotiations. (AP).
LOWE: Things to keep in mind after latest labor falloutMANNIX: NBPA issues memo to all players | Read memoLOWE: So you think nobody cares about the NBA, huh?

Kobe Bryant points an angry finger at Rajon Rondo during the second half of a 2009 Celtics-Lakers game. Unfortunately, these two rivals aren’t going to match up anytime soon as the NBA lockout appears no closer to a resolution than before the latest round of negotiations. (AP).

LOWE: Things to keep in mind after latest labor fallout
MANNIX: NBPA issues memo to all players | Read memo
LOWE: So you think nobody cares about the NBA, huh?

Shaquille O’Neal converts an easy dunk during a 2004 game against Seattle. Unfortunately for NBA fans, there won’t be any new dunks for a while as labor talks are at a stalemate after negotiations broke off late Tuesday. (John W. McDonough/SI).
MANNIX: Union furious with Stern for disclosing offerLOWE: A compromise for both sides in time for seasonSTAFF: What we’ll miss if games are cut | What we won’t missGALLERY: Revisiting the 1998 NBA lockout

Shaquille O’Neal converts an easy dunk during a 2004 game against Seattle. Unfortunately for NBA fans, there won’t be any new dunks for a while as labor talks are at a stalemate after negotiations broke off late Tuesday. (John W. McDonough/SI).

MANNIX: Union furious with Stern for disclosing offer
LOWE: A compromise for both sides in time for season
STAFF: What we’ll miss if games are cut | What we won’t miss
GALLERY: Revisiting the 1998 NBA lockout

Larry Bird and Magic Johnson battle for position during Game 1 of the 1985 NBA Finals. (Manny Millan/SI)
SI VAULT: Lakers finally beat Celtics and capture championship (6.17.85)SI VAULT: Larry and Magic were best of foes during 13-year rivalry (12.14.92)GALLERY: Larry Bird and Magic JohnsonGALLERY: Rare Photos of Larry BirdGALLERY: Magic Johnson: The College Years

Larry Bird and Magic Johnson battle for position during Game 1 of the 1985 NBA Finals. (Manny Millan/SI)

SI VAULT: Lakers finally beat Celtics and capture championship (6.17.85)
SI VAULT: Larry and Magic were best of foes during 13-year rivalry (12.14.92)
GALLERY: Larry Bird and Magic Johnson
GALLERY: Rare Photos of Larry Bird
GALLERY: Magic Johnson: The College Years