The result handed Manchester City the Premier League title and the performance was a far cry from the rip-roaring display Pogba put on a week ago.
Pogba inspired a stunning second-half comeback from United against City, but was hauled off after 58 minutes against West Brom.
Henry has questioned why Pogba would allow his performance level to drop so drastically.
He told Sky Sports: As soon as the game started, something was weird — the atmosphere of the stadium, the team — its so weird from what we saw from that team a week ago.
The commitment, the desire, and I asked if Pogba can do that all the time, the way he played against City. The answer is nope.
Jose Mourinho slammed Pogba and his team-mates after the game, insisting they preferred to show off rather than play any real football.
Pogba was singled out by Mourinho and not for the first time this season the Frecnhamn finds himself under fire at Old Trafford.
Mourinho revealed he suspected his side would be beaten by West Brom when he noticed his players losing their focus after the derby win.
Manchester United 2017/18 Fixtures
Bournemouth (A) – Wed 18 April
Tottenham – FA Cup (N) – Sat April 21
Arsenal (H) – Sun April 29
Brighton (A) – Fri May 4
West Ham (A) – Thurs May 10
Watford (H) – Sun May 13
And Henry sympathizes with the United boss, who he feels was powerless to prevent another dismal performance.[Mourinho] was trying to calm the players down and he has experience, he said.
He saw that result way before we saw it. He had a feeling that he needed to speak to the players during the week.
He told them be careful it is going to be different against West Brom and I go back to Pogba: why didnt you and the rest of the team do what you did against City all season?
West Brom outworked them; they wanted to go out and hurt them. After 10 minutes, I turned and there was a weird atmosphere and I could only see West Brom scoring.
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