The Red Devils were the superior team in the first half but the visitors couldn't make the breakthrough.
"If the team is not winning, his presence on the pitch will be important and it will be positive for him to play with (Romelu) Lukaku".
Birthday boy Marouane Fellaini, 30, came closest to making the breakthrough when he hit the woodwork after an excellent cross from Anthony Martial.
The Manchester United manager goes with Sergio Romero in goal, while at the back Chris Smalling and Marcos Rojo are the central duo.
Jose Mourinho's side were moments away from securing top spot in Group A when Lang pounced on sloppy defending to steal the points for second-placed Basel a minute before the end.
Midfielder Paul Pogba should start after scoring and providing an assist on his return from injury against Newcastle.
"When you're up in a game and you're getting opportunities like Man United did in the first half, you have to take your chances", Ferdinand said on BT Sport after the game.
United hit the woodwork twice in a dominant first half, but they were outplayed after the interval and could have few complaints about Lang's dramatic victor.
In Man United's final training session before the Basel game, three players were noticeable absent.
Basel's dynamic front trio kept United's defence - which included Rojo for the first time since April - busy during the early stages, but the visitors quickly got to grips and began to command proceedings.