David De Gea makes a stunning last-minute save to ensure United take the points.
Robin van Persie beats the keeper with aplomb after latching onto a Wayne Rooney pass.
Parity is restored in Romania thanks to Robin van Persie's rather fortuitous finish from a Wayne Rooney free kick.
Cluj shock Manchester United with an early goal through Pantelis Kapetanos, with question-marks raised over Patrice Evra's defending too.
Before kick-off Manchester United boss Sir Alex Ferguson told ITV's Gabriel Clarke he was expecting a stern test from Romanian champions Cluj.
Ferguson also paid tribute to midfielder Darren Fletcher, who returns to the United line-up in Europe after his long-term lay-off.
Ahead of tonight's game against Cluj, Manchester United fans would do well to heed the lessons of last year's Champions League campaign, when they failed to reach the knock-out stages for the first time in six seasons.
The rot set in last season on Matchday 2 when they had to come from behind to snatch a barely-deserved draw against Swiss side FC Basel.
Watch the best of the action in the video player above.