dominant presence

A Shaquille O'Neal is retiring from the NBA after 19 seasons.A O'Neal made the announcement over Twitter, where he has 3.8 million followers, on Wednesday.A At 7-foot-1 and 350 pounds, he was a dominant presence in the middle winning four NBA championships - three with the Los Angeles Lakers and one with the Miami Heat.

Leander Paes and Cara Black won the Australian Open mixed doubles title, beating Ekaterina Makarova and Jaroslav Levinsky 7-5, 6-3.

Laes led the top-seeded pair Sunday with a dominant presence at the net and quick footwork.