A point in Switzerland would've guaranteed progression, but after squandering a host of good first half chances, Basel grew into the game after the break, eventually finding a 90th minute victor through Michael Lang.
Herrera, though, believes United's detractors are not looking at the bigger picture, telling beIN SPORTS: "If you look at Manchester United's statistics, until three weeks ago, we had scored the same number of goals as Manchester City had and we were the second-highest goalscoring team in the league".
United hit the woodwork twice as they controlled the first half while Basel dominated after the break and missed a string of chances before Lang sent the fervent home crowd into raptures.
What should have been a chance to wrap key players in cotton wool now has something riding on it, especially as CSKA have their own qualification scrap going on after they beat Benfica.
"It was a good cross and he came round the back and I was a little too late", he stated, "We have enough confidence in the group, we will be well".
George Clooney returning to TV for Catch-22 mini-series
Catch-22, considered one of the most influential books of the 20th century, follows the exploits of Captain John Yossarian, a U.S. George Clooney will return to TV for the limited series " Catch 22 ", Deadline reported today.
"We lost because in the first half we should be 5-0 and we couldn't score one goal after being so dominant, and so dominant in such a way that for many periods in the first half it looked impossible not to win", manager Jose Mourinho fumed afterwards.
Marcos Rojo returned from seven months out with a knee injury and was one of United's better players.
Fellaini threatened again with another header that fizzed wide from Daley Blind's free-kick.
And, in the 89th minute, Basel's Raoul Petretta fizzed a low cross across the box for Lang to tap in at the far post.