Justin Langer could become Australia's fourth retirement of the season © Getty Images

Justin Langer will announce today whether he is to join Shane Warne, Damien Martyn and Glenn McGrath in retiring from Test cricket. He will reveal his plans in a press conference at Sydney at noon local time amid growing speculation he's going to quit.

"I can't say categorically that I won't make an announcement before the start of the Test," Langer told The Australian newspaper, "but at the same time, I can't say categorically that I will. I haven't spoken about it with anyone. I haven't even spoken about it with Sue."

If Langer does bring the curtain down on his playing days it will end Australia's most prolific opening partnership in Test history with Matthew Hayden.

His father, Colin, told The Sunday Age his son wasn't going to outstay his welcome. "He's been privileged to play for his country for 104 Test matches," he said. "The way he's gone about his career has been a thrill for his family."

It's likely that if Langer does go after the final Test at Sydney which starts on Tuesday, then he will carry on playing at state level, as captain of Western Australia.