Man Utd remained in sixth place with only 55 points in 35 games, 5 points behind Arsenal.
On the contrary, Chelsea's tally increased to 66 points, remaining in third place.
Chelsea scored the first goal by the Spanish Marcos Alonso in the 60th minute, before the Portuguese international star Cristiano Ronaldo equalized 2 minutes after Chelsea's goal, saving Manchester United from a defeat.
This season, Ronaldo's goal became his 17th goal in the Premier League, sharing the second place in the top scorers' list with Tottenham's South Korean Heung-Min Son, behind Liverpool's Egyptian star Mohamed Salah.