The Blues began the defence of their Premier League crown with a chastening 3-2 defeat at Stamford Bridge that was sparked by the 14th-minute dismissal of captain Gary Cahill for a studs-up tackle, while Cesc Fabregas was sent off later for a second bookable offence.
Burnley reacted brilliantly by powering into a 3-0 lead with two goals from Sam Vokes and a Stephen Ward strike, before replies from Alvaro Morata and David Luiz saw the ensuing fightback fall just short.
Rudiger, Chelsea's £29million summer signing from Roma who was making his Premier League debut, admits the team dealt poorly with the setback of losing Cahill.
"If you have a red card early in the game it’s a shock moment for everyone but we are all professionals and we need to do better in those kind of situations," the Germany full-back told the club's official website.
"We conceded three goals too easily. We tried our best but at the end of the day football is about results and we lost. In the second half we deserve compliments because you saw a team who tried when it wasn’t easy and at the end of the match we had two men less.
"We have to take the positives from the game, like the second half, work hard during the week and play a good match against Tottenham."