Tottenham manager Jose Mourinho has spoken about his frustration regarding the fitness of midfielder Tanguy Ndombele.

The club's record signing has struggled to find full fitness since arriving in the summer.

He has only started ten Premier League games, and came off after 25 minutes against Southampton.

Mourinho acknowledged Ndombele's quality, but admits the constant injury problems are a concern.

"He's always injured," Mourinho told reporters.

"He's injured, he's not injured, he plays one match, next week he's injured, he plays another match, we are full of hopes.

"This is it since the beginning of the season. Of course, it is a concern.

"You think you have a good player, you think he is in an evolution process, he plays very well against Norwich City, you are full of hopes that today he is ready for it.

"And he is not ready for it. I cannot say much more than that. It's a situation from the beginning of the season."