The Bayern star did not play in the first leg at Allianz Arena but has confirmed he will return for the Old Trafford fixture.
"I'm here, I'm feeling good and feeling positive," said Robben. "I haven't made this trip to just sit in the stands.
"It's very important for me to play in this game. The injury came at a bad time, they always do, but this is an important game."
And Robben added that he was happy where his career had taken him even though he turned down an opportunity to join Manchester back in 2004 when he ended up at Chelsea.