By Michael Roddy LONDON, (Reuters) – Wimbledon is the top grand slam championship for attracting social media-savvy tennis fans, with more followers on Facebook, Twitter and Instagram than any of the other three, a survey released on Wednesday said. The tournament’s 4.1 million followers on the social media websites put Wimbledon on top, with the French Open second on 3.7 million and the U.S. and Australian Opens lagging behind, the study by sports and entertainment intelligence firm Repucom said. The Wimbledon 2014 men’s singles final, in which Novak Djokovic defeated Roger Federer, was the single most popular grand slam match on social media, with a combined 585,000 posts, almost double that of any other.