Chelsea face an Atletico Madrid side on Tuesday suffering their worst dip in form all season, still recovering from an injury list worsened by a spate of coronavirus positives, and with coach Diego Simeone close to abandoning the system that has sent them to the top of La Liga because he is running out of the right players to play it.
The weekend defeat by Levante was Atletico's first at home since December 2019. It also made it five points picked up in their last four games. And it was the seventh consecutive match that they had failed to keep a clean sheet in.