Our no.10 had also been in fine form of late, registering four goal contributions in his last six league appearances.
However, the Reds will have to make do without his creativity and finishing flair at Old Trafford, against a resolute Brentford squad who still harbour European hopes of their own.
Harry Maguire returns from suspension in the only other change from the 1-0 win against Chelsea, with the England international set to make his 600th career appearance.
Meanwhile, Lenny Yoro is also back in the matchday squad after recovering from the knock which kept him sidelined last time out.
