Is this proof Jose Mourinho got it wrong over David Luiz?

Former Chelsea defender David Luiz is ahead of Gary Cahill in several areas based on stats from this season.

 Luiz V Cahill Oulala

This evening David Luiz will face his old club Chelsea for the first time since leaving London to join Paris Saint-Germain for £50 million last summer.

It appeared Luiz was surplus to requirements at Stamford Bridge when Jose Mourinho chose to cash in, opting for his preferred John Terry and Gary Cahill partnership.

On the dawn of the last 16 clash between PSG and Chelsea, Opta powered fantasy football game decided it was time they checked out how Luiz was performing in Ligue 1 since his switch and how his stats matched up to ex-teammate Cahill, thus revealing whether Jose Mourinho did the right thing when he offloaded the Brazilian.

With Cahill playing five more games and racking up 300 more minutes than Luiz this season, the comparison has been made via a per 90 minute basis with the seven main defensive criteria being analysed.

The first stat Oulala looked at was tackles won with Luiz leading the way comfortably with a swing of almost 10% in his favour, 52.7% to Cahill's 43.9%. For head-to-head battles again Luiz edges it. Luiz excels aerially with a success rate of 78.6% compared to 69.1% from Cahill. On the ground the PSG centre-back leads further with 65% of his duels won, while Cahill has only racked up a rate of 59.8%.

Luiz also leads for interceptions with 2.3 per 90 minutes compared to 1.02 from his opposite number. However, Cahill does peg the Brazilian back for blocks and clearances. The Chelsea defender edges blocks narrowly, 0.79 to 0.66 per 90 minutes with 6.19 clearances to Luiz's 4.43.

The passing stats for both players are impressive, however it is Luiz that leads again with an impressive 90% completion of all passes made, Cahill falls just short with 87%.

So with Luiz leading Cahill in five of the seven main defensive criteria this season, is it possible that Mourinho was wrong when he sold the Brazilian to Paris? Did he in fact sell the wrong man?

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