The tackling criteria is dominated by full-backs and the defender who has made the most in the Premier League this season is Stoke's Pieters. His total of 80 have come at an unrivalled rate of 3.8 per game.
In terms of tackle success, however, Bournemouth's Adam Smith ranks as the most efficient among defenders to have made at least 30. The 24-year-old has won 39 of the 42 he has attempted, giving him an impressive success rate of 92.86 per cent.
Anticipating danger is another major part of a defenders' role, and it's Arsenal's Koscielny who comes out on top with 69 so far this season, giving him an average of 3.8 per game, the highest of any defender. The Frenchman is followed by that man Pieters, who is level with West Brom's Jonny Evans on 58.
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Clearances
Most clearances
Player
Team
Clearances
Sebastien Bassong
Norwich
181
Ashley Williams
Swansea
163
Toby Alderweireld
Tottenham
158
Robert Huth
Leicester
144
Steve Cook
Bournemouth
141
Chancel Mbemba
Newcastle
136
Jan Vertonghen
Tottenham
130
Russell Martin
Norwich
126
Ramiro Funes Mori
Everton
125
Virgil van Dijk
Southampton
118
Clearances may not be a glamorous aspect of the game - and some prefer to pass their way out of trouble - but they are a defender's bread and butter nonetheless. Norwich's Sebastian Bassong has made the most (181) followed by Swansea's Ashley Williams (163) and Spurs' Alderweireld (159).
Blocks
Most blocks
Player
Team
Blocks
Ashley Williams
Swansea
28
Scott Dann
Crystal Palace
26
Fabricio Coloccini
Newcastle
26
Wes Morgan
Leicester
23
John Stones
Everton
20
Chancel Mbemba
Newcastle
18
Steve Cook
Bournemouth
18
Damien Delaney
Crystal Palace
18
A brave block can be as valuable as scoring a goal, and no defender has made more of them than Swansea's Williams (28) this season. Crystal Palace's Scott Dann has also got his body in the way on plenty of occasions (26), along with Fabricio Coloccini of Newcastle (26) and Leicester's Morgan (23).
Duels
Most duels
Player
Team
Duels
Erik Pieters
Stoke
244
Simon Francis
Bournemouth
233
Billy Jones
Sunderland
221
Bacary Sagna
Man City
190
Chancel Mbemba
Newcastle
187
Nacho Monreal
Arsenal
187
Daryl Janmaat
Newcastle
186
Adam Smith
Bournemouth
182
Nicolas Otamendi
Man City
181
Which defenders do strikers hate coming up against in a duel? Stoke's Pieters would be right up there. He never shies away from a challenge and has competed a whopping 244 duels this season.
But while Pieters has won well over half of his duels, his success rate falls below a number of other defenders. Of those to have been involved in at least 75 duels, West Ham's Reid sits at the top of the pile with a 75 per cent success rate from his total of 104. Aston Villa's Micah Richards is next on 72.86 per cent, followed by Arsenal's Per Mertesacker on 71.91 per cent.
Passes
Most successful passes
Player
Team
Successful passes
Ashley Williams
Swansea
1070
Bacary Sagna
Man City
988
Jan Vertonghen
Tottenham
951
Simon Francis
Bournemouth
942
Toby Alderweireld
Tottenham
908
Federico Fernandez
Swansea
898
Jose Fonte
Southampton
866
John Stones
Everton
863
Nacho Monreal
Arsenal
854
Chris Smalling
Man Utd
820
Williams name crops up again with passes. The Wales international has completed 1070 in total, making him the only defender to have made it into four figures.
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Passing accuracy (min 300 passes)
Player
Team
Passing accuracy
John Terry
Chelsea
89.89%
Gabriel Paulista
Arsenal
89.89%
Per Mertesacker
Arsenal
89.74%
John Stones
Everton
89.43%
Eliaquim Mangala
Man City
88.78%
Mamadou Sakho
Liverpool
88.69%
Laurent Koscielny
Arsenal
87.40%
Ashley Williams
Swansea
87.13%
Jan Vertonghen
Tottenham
87.01%
Federico Fernandez
Swansea
86.35%
Williams also features in the top 10 for passing accuracy, but the most efficient defenders in possession have been Chelsea's John Terry and Arsenal's Gabriel Paulista, who have clocked an 89.89 per cent success rate. Mertesacker ranks third (89.74 per cent) and it's no surprise to see the cultured John Stones on the list too (89.52 per cent).
Chances created
Most chances created
Player
Team
Chances created
Alberto Moreno
Liverpool
41
Aleksandar Kolarov
Man City
32
Aaron Cresswell
West Ham
26
Charlie Daniels
Bournemouth
22
Nacho Monreal
Arsenal
21
Bacary Sagna
Man City
20
Simon Francis
Bournemouth
20
Cedric Soares
Southampton
19
Unsurprisingly, full-backs dominate the field in chances created, with Liverpool's Alberto Moreno leading the way on 41 so far this season.
Most assists?
Four defenders have contributed three Premier League assists this season: Seamus Coleman, Glen Johnson, Aaron Cresswell and Bacary Sagna.
Most clear chances created
Player
Team
Clear chances created
Hector Bellerin
Arsenal
7
Glen Johnson
Stoke
5
Ryan Bertrand
Southampton
4
Alan Hutton
Aston Villa
3
Erik Pieters
Stoke
3
Kyle Walker
Tottenham
3
Aaron Cresswell
West Ham
3
Joel Ward
Crystal Palace
3
Daryl Janmaat
Newcastle
3
In terms of clear-cut chances, however, it's another Spaniard who tops the charts. Arsenal's Hector Bellerin has laid on seven such opportunities, with Stoke's Glen Johnson (five) and Southampton's Ryan Bertrand (four) next. Only two of Moreno's overall tally have been classified as clear-cut by Opta.
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Goals scored
Most goals scored
Player
Team
Goals
Laurent Koscielny
Arsenal
3
Russell Martin
Norwich
3
Scott Dann
Crystal Palace
3
A goalscoring defender is a precious asset, and this season, Koscielny, Dann and Norwich's Russell Martin have netted three each.
Which defender do you think has been the best in the Premier League this season? Let us know by tweeting @SkyFootball