Mauricio Pochettino said his Chelsea players need to grow up as a team after they were beaten 1-0 at Stamford Bridge by Aston Villa to fall to their third loss of the season.

The game turned with the sending off of Chelsea's Malo Gusto after 58 minutes when the score was still 0-0.

His challenge on Lucas Digne was late and caught the Villa defender on the ankle and, after a pitchside VAR review, referee Jarred Gillett upgraded the initial yellow card to a red for dangerous play.

Pochettino brought on Ben Chilwell and moved Axel Disasi to right-back but the dismissal did not much alter Chelsea's attacking intent as they continued to seek out a winner.

It was a decision that would come to haunt them, as with the home side committed inside Villa's half Moussa Diaby broke with the ball and fed Ollie Watkins, who after seeing his first shot blocked by Levi Colwill scored with his second, angling the ball beyond Robert Sanchez and in off the far post.

It was the second time in two seasons that Watkins has netted in a Villa victory at Stamford Bridge, as Unai Emery's side took full advantage of Chelsea's ongoing inability to turn promising situations in the final third into goals, before pouncing when their own moment came.

Striker Nicolas Jackson, who has scored just once since his £31million summer move from Villarreal, again cut a frustrated figure as he picked up his fifth booking of the season for attempting to block a Villa free-kick, incurring him a one-game ban.

Pochettino refused to criticise the officials and said it is the players that must take the rap for the team's poor start to the season.

"It's our responsibility and the players' responsibility," said Pochettino.

"We can't blame the VAR or the referee. The situation, we need to act different, in a different way. I'm not going to blame or say anything against Malo Gusto. Situations happen in football and they affect the game and the team in a negative way.

"We need to grow up like a team, not only in an individual way."