LONDON - Martina Hingis backed Serena Williams' bid to secure a calendar Grand Slam, saying the world number one would be even hungrier this time to secure the Wimbledon title. With the third tennis major of the year getting under way, Hingis said Williams would be focused on her golden chance to win all four Slams -- Wimbledon and the Australian, French and US Opens -- in the same season. Only Maureen Connolly (1953), Margaret Court (1970) and Steffi Graf (1988) have achieved the feat. Five-time Wimbledon champion Williams has lost in the fourth and third rounds in her last two appearances -- which Hingis thinks will motivate the American all the more. "She's probably even more hungry because the last couple of times, it was not the way she wanted it. If anyone can do it's definitely Serena."