London: Manchester United's results are not good enough after the investment made in the team, but top director David Gill called Sunday for fans to stop jeering under pressure coach Louis van Gaal.

Gill, a former chief executive who remains on the United board, said: "Clearly we all hoped the results would have been better and everyone is disappointed with that. "Undoubtedly it has been a season of underachievement given the investment that was made in the summer."