Robin van Persie scored a late penalty to secure an important three points as United ran out 3-1 winners.
Despite the result it was a difficult game for United and Pereira congratulated Smalling on his match-winning performance:
The scoreline suggested that the win against Burnley was a routine one for United but it was anything but.
Sean Dyche’s side were fearless and hurried United in possession, particularly during an impressive first half showing.
Danny Ings levelled the scoreline for Burnley and they could have easily gone in front but missed several good chances.
United will have to play much better if they are to secure Champions League football next season.