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With many almost certain already that Manchester City will retain the title this year without much resistance, David Luiz and his Chelsea teammates took exception as they emerged 2-0 victors of their clash with the champions on Saturday and the Brazilian's contributions at both ends of the pitch were vital.
Few can attest to shutting out the Cityzens - Pep Guardiola's plethora of attacking talent coupled with his free-flowing and expansive style often proves overwhelming to even the most organised of opposition - and, after their limp performance against Spurs a few weeks prior and a shock loss to Wolves, there was an inevitable expectation that the Blues would suffer another defeat against the team who broke records for fun last season.
However, Maurizio Sarri proved any premature doubters wrong as his side pulled off a massive result and the Italian largely has Luiz to thank after the 31-year-old flicked in the Stamford Bridge outfit's second and was instrumental in denying any opportunities at the other end.
The former PSG man completed 2 tackles, 1 interception and 7 clearances as he showed shades of the centre-back that performed so well on such a regular basis during his returning season under Sarri's predecessor, Antonio Conte.
Surely few would be surprised at such a showing from the 56-capped international - as he has proved his top quality on numerous occasions - but, equally, there would be little bewilderment if he was to reproduce the error-strewn performance he gave against Spurs.
Therein lies the enigma that is David Luiz - you never know which version of the £31.5m man you will get and there are few other players at the top end of the Premier League who can bounce between the two extremes of the scale from week to week in such a way. Admittedly, the number 30 has been a solid performer for Sarri this season, but is he consistent enough to be replied upon as the Blues look to present a real challenge to the likes of Liverpool and City for the league?
The five-time Premier League winners will surely be in the hunt for both a new creator and striker within the next couple of transfer windows, but maybe a centre-back should be added to the wish-list with Luiz's dependability never guaranteed and rumours of his exit beginning to surface too.
So, Chelsea fans, do you think that bringing in a new central defender should be on the agenda? Let us know in the poll below...