London - Four-time winner Andy Roddick will polish his Wimbledon preparation at the prestige Queen's Club event, the American said Thursday.

Roddick lifted a trophy hat-trick in 2003 to 2005 and then added a fourth two years ago at the London grass court event. He joins a field led by Rafael Nadal and Andy Murray.

World number 1 Nadal has confirmed his hopes of repeating as holder as he returns for a third straight year.

He earned the grass double in 2008 - Queen's and Wimbledon - as he took the All England club title from Roger Federer after a five-year run for the Swiss. (dpa)