Tempers flare between New York’s Bill Bradley and Golden State’s Rick Barry during a 1975 game at Madison Square Garden. The contentious scene is appropriate after negotiations between the owners and players fell apart on Monday, leaving the 2011-12 season in jeopardy. (Bettmann/CORBIS)
Julius Erving and his wife Turquoise relax at their home in Babylon, NY during a 1978 SI photo shoot. (Lane Stewart/SI)
George Gervin swoops in for a dunk during a 1979 playoff game between the Spurs and Bullets. Washington would go onto win the series, but would lose to Seattle in the NBA Finals. (James Drake/SI)
Bob Cousy slices through the lane during a 1956 game between the Boston Celtics and Rochester Royals. (Hy Peskin/SI)
GALLERY: Iconic Celtics Photos
Kobe Bryant and Shaquille O’Neal attempt to grab a rebound during Game 5 of the 2001 NBA Finals. The Lakers won the game and the championship as O’Neal was named MVP of the series. (John Biever/SI)
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)
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)
Scottie Pippen and Benny the Bull wait for an elevator before a Bulls-Hawks game last May. (Icon/SMI)
GALLERY: Best of Did You See That?
Manute Bol (7-foot-7, 200 lbs) runs back on defense during a 1990 game between the 76ers and Pacers. (Manny Millan/SI)
GALLERY: Classic photos of Manute Bol
Tony Parker tries to beat a scrambling Celtics defense during a 2008 game in San Antonio. (Greg Nelson/SI)
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).
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
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)