After being outwitted by his rival tactician back in September, Thomas Tuchel must turn the tables back on Pep Guardiola and devise the perfect game plan against Manchester City this weekend to keep Chelsea's faint title hopes alive.
A miserable December which saw them claim just three wins out of seven has left the Blues trailing City by 10 points at the Premier League summit. As a result, they can barely afford a draw at the Etihad on Saturday if they have any realistic ambitions of becoming champions.
Tuchel, who got it horribly wrong when Guardiola's men dominated his side on their way to a 1-0 win at Stamford Bridge earlier in the season, has a number of tactical conundrums to weigh up ahead of their trip to Manchester - and Sportsmail have run the rule over his best options.