By Robert Woodward PARIS (Reuters) – As ever, David Ferrer is performing his role as understudy to the main man from Spain to perfection. He goes on court, completes his task quickly and efficiently and leaves the stage free for Rafael Nadal to give the crowd what they really want. So it was on Saturday at the French Open as the fifth seed eased past Italy's Andreas Seppi 6-2 7-6(2) 6-3 in the first match on a sparsely populated Court One, finishing shortly before defending champion Nadal took to a full Philippe Chatrier show court to play Leonardo Mayer. But this year there is a chance the two men may switch roles if they meet in the quarter-finals at Roland Garros.