Roger Federer has dropped to number five in the men’s world rankings, his lowest position in a decade.The 31-year-old Swiss fell two places after being knocked out of Wimbledon in the second round by Sergiy Stakhovsky.Briton Andy Murrya, 26, won Wimbledon but stays second, behind number one Novak Djokovic, who was runner-up.Serena Williams remains world number one despite being beaten by losing finalist Sabine Lisicki in the fourth round at Wimbledon.Federer’s new ranking is his lowest since he was fifth on 23 June 2003, two weeks before he won Wimbledon for the first of his record 17 Grand Slam victories.Rafael Nadal, who won the French Open, was a shock first-round casualty at Wimbledon and is fourth in the men’s rankings behind fellow Spaniard David Ferrer, who reached the quarter-finals.