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

Tanguy Ndombele has yet to stamp his authority on Jose Mourinho’s Tottenham Hotspur team.

On the chalkboard

The midfielder was signed from Lyon in the summer for a club-record fee.

However, he has appeared to struggle with match fitness and has played 90 minutes just twice in the league, against Aston Villa on the opening day and against Manchester City a week later.

Under Mourinho, he has played a total of 140 minutes, with just 20 minutes coming against Manchester United, 46 against Sheffield United and 74 versus Bournemouth.

Defensively, he has struggled, making just three tackles in those games, with all three coming against the Cherries. The same goes for his two interceptions, while he has been dribbled past once in each game.

Offensively, he has completed a total of eight dribbles – five against Bournemouth – while he had one shot in each game and two assists, both against the Blades.

He has also averaged a pass completion rate of 86.5% but this is a player who is yet to prove his worth.

Who is that?! Can you name all of these obscure Spurs signings? Give it a go now...

A problem

Ndombele risks being left behind.

Mourinho is currently assessing the strengths and weaknesses of his squad and, as it is, Ndombele is a weakness.

Not only is he struggling to actually finish a game, but he is also not really enjoying top performances when he is on the pitch.

Moussa Sissoko has been in excellent form, scoring in two successive home games, while Mourinho has also used Eric Dier repeatedly in a defensive midfield role.

If Ndombele cannot get back to fitness and prove his worth, he may well end up with splinters from sitting on the bench.

Meanwhile, Spurs fans have been reacting to a cheeky tweet from the club's official account.