This article is part of Football FanCast's The Chalkboard series, which provides a tactical insight into teams, players, managers, potential signings and more...

Charlton make the short trip across south London this Saturday to take on rivals Millwall, in what will be the first meeting between the two sides since a League One clash back in January 2017.

Lee Bowyer's men currently sit 10th in the Championship with 22 points from their first 15 games, but suffered their fifth defeat of the season last time out with a 1-0 loss to Preston at The Valley.

In Millwall's case, Gary Rowett's side are down in 17th, but could go to within a point of their south London rivals with a win at The Den on Saturday.

Let's take a look at two Millwall players who Bowyer cannot afford to be complacent over in his pre-match team-talk.

Jed Wallace

Soccer Football - Championship - Millwall v Leeds United - The Den, London, Britain - October 5, 2019 Millwall's Jed Wallace celebrates scoring their first goal Action Images/Alan Walter EDITORIAL USE ONLY. No use with unauthorized audio, video, data, fixture lists, club/league logos or "live" services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. Please contact your account representative for further de

The 25-year-old has enjoyed an excellent campaign so far for the Lions.

Millwall's No.7 has scored six goals and also registered one assist in 13 Championship appearances this term, averaging a goal involvement every 1.86 games.

As per WhoScored, Wallace has 2.2 shots per game on average, as well as making 1.5 key passes and completing 1.6 dribbles, but his impressive attacking contributions have not harmed his defensive output - he completes 2.2 tackles per game as well.

Matt Smith

The 6 foot 5 powerhouse of a striker will be a handful for Naby Sarr, Tom Lockyer and Jason Pearce this weekend.

Aside from the fact that he appears almost unbeatable in the air with 9.3 aerial duels won per game, Smith also contributes a healthy amount of goal involvements with three goals and two assists in 12 appearances this season - the 30-year-old is involved in a goal every 2.4 matches.

Smith is, quite simply, a mountain of a man who bases his game around physicality and bullying centre-backs.

This aspect, coupled with the more diminutive Wallace standing at 5 foot 8 running off of him, makes the pairing a key feature of Millwall's attacking play - Bowyer must set his backline out to combat it, or Charlton may head back to The Valley with their tails tucked between their legs.