Manchester United must entertain fans, Van Gaal says

Manchester United head coach Louis van Gaal welcomes forward Javier Chicharito Hernandez (14) onto the pitch in the second half against AS Roma at Sports Authority Field. Manchester United defeated AS Roma 3-2. Jul 26, 2014; Denver, CO, USA; Ron Chenoy-USA TODAY Sports

(Reuters) - Louis van Gaal's biggest challenge as Manchester United manager will be to provide entertaining football for the club's supporters, he said on Friday.

After a successful series of pre-season matches, United open their Premier League campaign with a home fixture against Swansea City on Saturday.