The 36-year-old was only returning from a two-week absence at the weekend after limping out of the draw at Bolton.

But five minutes before the break during yesterday's 2-2 draw, he was headed for the touchline again.

Although Ferguson has not put a timescale on the latest absence, it is clear that Giggs will be given time to get over the problem after again impressing during the early weeks of the campaign

"The loss of Ryan as a wide player was a big one for us," Ferguson told MUTV.

"He has done his hamstring again.

"He got it against Bolton but he had trained all week and had been doing very well.

"But it has gone again and maybe we need to give him a longer recovery."