Prime Minister David Cameron says Andy Murray deserves a knighthood after becoming the first Briton to win the Wimbledon men's singles since 1936.Murray won the title with a 6-4 7-5 6-4 triumph against world number one Novak Djokovic on Sunday."I can't think of anyone who deserves one more," said Cameron, who watched the match from the Royal Box.But Murray said: "It's a nice thing to have or be offered but I don't know if it merits that."Cameron said Murray's win had "lifted the spirits of the whole country".The prime minister cannot personally award an honour to the 26-year-old, stressing that they are awarded independently.People are nominated for their achievements by members of the public and whether they are given an honour - and the type of honour - is decided by a committee.