What was Atletico's home leg had to be played in Bucharest due to a ban on flights from Britain to Spain to try and stop the spread of coronavirus variants.
I was very happy with the performance energy-wise, our intensity. We had I think 16 recoveries in the last third. We were very structured, we did not allow any dangerous counter-attacks to one of the most dangerous teams
Chelsea controlled the early proceedings of the match but failed to go ahead as Olivier Giroud narrowly failed to connect with Callum Hudson-Odoi's low cross.
Tuchel moves to Stamford Bridge following a two-and-a-half year spell at French champions PSG, which came to an end last month. He will be the first German to manage Chelsea and arrives having guided PSG
Earlier, Manchester City forward Gabriel Jesus and England defender Kyle Walker tested positive for the coronavirus, and three more positive cases were confirmed on December 28.
It was an evening to forget for two of the league's supposed title contenders on Tuesday, with Chelsea's 2-1 loss at Wolverhampton followed by Manchester City's 1-1 draw at home to West Bromwich Albion
Three of the teams expected to contend for the title — Manchester City, Chelsea and Liverpool — all picked up wins in back-to-back fixtures on Saturday
The principal difference on the field would be the reduction of the Premier League from 20 to 18 teams with the overall number of clubs in the top four English divisions shrinking from 92 to 90.
