Rashford has endured a difficult season since his belated go back to motion in October following shoulder surgery.
The England international turned into in United's starting line-up for the midweek Champions League final 16 first leg draw at Atletico Madrid.
But, no longer for the first time this season, he didn't have an impact and turned into substituted with 15 minutes left.
Rashford's alternative, Anthony Elanga, netted the equaliser and Rangnick made no attempt to conceal his big name's struggles beforehand of Saturday's Premier League sport in opposition to Watford.
"He's really now not injured, he sincerely has no issues with his shoulder any greater," Rangnick informed newshounds on Friday.
"I think we've talked loads about Marcus in the last couple of weeks and I even have in my opinion spoken loads with him.
"It's with him like with all the other gamers, it counts if they're at the pitch and that they just ought to perform.
"I'm pretty certain that he's not happy together with his performance proper now however it does not help if we speak that each week."
The 24-yr-antique has handiest 5 goals in 22 appearances this season.
But, difficult Rashford to look on the intense facet after some correct schooling performances lately, Rangnick introduced: "I do not see any motive why he should not be satisfied.
