Ryan Giggs has urged Manchester United to stick with under-fire manager Jose Mourinho or risk entering a vicious cycle of instability.

Mourinho's position is coming under increasing scrutiny following a four-match winless run in all competitions and a seemingly difficult relationship with star midfielder Paul Pogba.

Former Old Trafford favourite Paul Scholes declared the Portuguese to be "embarrassing" the club and expressed surprise he remained in the post after Saturday's 3-1 loss at West Ham.

Fellow ex-United star Giggs, however, issued caution over the potential fallout of dismissing Mourinho.

"They're going through a tough time but change now and they'll be in the same position in a year or so," the Wales manager told reporters.

"I believe he should keep his job and I think the problem of late has been forward planning. So just take stock, they're going through a tough time, but my stance hasn't changed."

United entertains Newcastle United on Saturday in its final fixture before the international break.