Our no.1 palmed away a long-range effort by German defender Antonio Rudiger just before half-time, only for Marcos Alonso to follow up and convert from a narrow angle to level the game.
Despite that, Mata insists he and his United colleagues still have a huge amount of confidence in De Gea.
“David is unquestionable for me,”
Mata, the Reds’ goalscorer against Chelsea, told Sky Sports after the game.
“His levels have been fantastic for this club. He has been the best player over the last years. The amount of points that he has saved us is incredible.