British No 1 Tim Henman has been seeded sixth for his 12th attempt at Wimbledon glory.

Defending champion Roger Federer is the top seed, with Andy Roddick, the man he defeated in last year's final, seeded second ahead of former champion Lleyton Hewitt.

Henman is ranked ninth in the world but moves ahead of Argentina's Guillermo Canas and Russian Nikolay Davydenko due to his better grass court pedigree.

Andre Agassi's withdrawal through injury also lifts Henman, a beaten quarter-finalist last year, another place in the list.

Henman was fifth seed 12 months ago when he lost in straight sets in the last eight to Croatia's Mario Ancic, who is seeded 10th.

The 30-year-old Oxfordshire star has been in unconvincing form so far this season, failing to reach the semi-finals of any of his ten tournaments.

Being unable to match last year's run to the semi-finals of the French Open meant Henman came into the grass court season feeling fresh, but he looked out of sorts in his quarter-final loss to Thomas Johansson in the Stella Artois Championship last week.

He at least is seeded however, a luxury not afforded to British No 2 Greg Rusedski.

In the women's singles, world No 1 Lindsay Davenport is the top seed ahead of defending champion Maria Sharapova.