British bookmakers William Hill installed American Andy Roddick [ Images ] as favourite to win the Wimbledon [ Images ] men's singles title after top seed and defending champion Lleyton Hewitt's [ Images ] first round defeat on Monday.

Roddick, champion on grass at the Stella Artois Championships a week ago, is quoted at 11-4 with Andre Agassi [ Images ] second favourite on 100-30.

Serena Williams [ Images ] is an overwhelming favourite to retain her women's singles titles.

The odds:

Men's singles -
Andy Roddick (US) 11-4
Andre Agassi (US) 100-30
Roger Federer [ Images ] (Switzerland [ Images ]) 5-1
Tim Henman [ Images ] (Britain) 8-1
Mark Philippoussis (Australia [ Images ]) 16-1
Greg Rusedski [ Images ] (UK) 20-1
Sjeng Schalken (Netherlands) 25-1

Women's singles -
Serena Williams (US) 4-6
Venus Williams [ Images ] (US) 100-30
Kim Clijsters [ Images ] (Belgium) 4-1
Justine Henin-Hardenne (Belgium) 7-1
Jennifer Capriati [ Images ] (US) 25-1
Chanda Rubin (US) 25-1

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