Murray: Sampras still best ever on grass

Roger Federer remains on track for a record-breaking 15th grand slam title after breezing through the first round at Wimbledon but the Swiss ace is not the best ever grasscourt player, according to Andy Murray.

World number two Federer made a confident start to his grasscourt season with a straight-sets win over Yen-Hsun Lu yesterday, but he has yet to convince Murray that he is a better player than Pete Sampras.