Arsenal held out for a first clean sheet away from home in the Premier League this season to move ahead of Chelsea on goal difference into fourth.
Gerard Deulofeu came off the bench to spark an incredible comeback as Watford beat Wolves 3-2 to set up an FA Cup final against Manchester City.
Watford striker Troy Deeney will serve a three match ban for violent conduct during last Saturday's fiery Premier League clash with Stoke, the Football Association announced on Tuesday.
Manchester United were rocked by Etienne Capoue's first half opener and, although Marcus Rashford equalised after the break, Jose Mourinho's side capitulated in the closing stages of the Premier League match
Blackpool prevailed thanks to an injury-time own goal from Barnsley's Scott Wiseman, while Darius Henderson exploited a stoppage-time error by Blackburn Rovers goalkeeper Jake Kean to earn Forest a first league win at Ewood Park since 1999.