MUMBAI (REUTERS) - Manchester United great Bryan Robson believes Louis van Gaal's players can do more to prevent boring displays and wants them to exhibit the same attacking football that has made the Premier League side arguably the world's most popular football club.

United have alienated a section of their fans and former players with a series of soporific displays this season and were booed by their supporters at home on occasions.

Robson, United's longest-serving captain, feels the fans are justified in being frustrated with the dour playing style of a club famed for entertaining fans with their attacking flair.

The 59-year-old said the players could do more to woo the fans again.

"Lot of people will always blame the coach but sometimes the players have to express themselves a little bit more," the former England captain said. "The players have to take that responsibility.

"We are in the entertainment business and that's why Manchester United have 680 million fans around the world. We have to entertain those fans and that's always being part of Manchester United."

United have dominated possession against most opponents but have largely failed to convert it into goals, lacking creativity in and around the 18-yard box.

Robson, who was in Mumbai to inaugurate a football pitch created by Apollo Tyres using recycled rubber, said United currently lacked players who could supply that extra bit of flair.

"Sometimes you need attacking players with a bit of imagination and flair to actually produce that type of football. At the moment we are just a little bit short of that. We are not far off," said Robson, who scored 99 goals in 461 appearances for United during his 13 years at the club. "People like (Wayne) Rooney, (Anthony) Martial, (Memphis) Depay and (Juan) Mata - they have all got great ability and it's just about getting a little bit better."